T U T O R I A L : A M O D E L F O R C I R C U I T S

Size: px
Start display at page:

Download "T U T O R I A L : A M O D E L F O R C I R C U I T S"

Transcription

1 South Pasadena Physics Name 10 Circuits Period Date T U T O R I A L : A M O D E L F O R C I R C U I T S Tutorial Instructions This Tutorial contains Activities and Exercises. Activities: These are intended to be completed in groups with the appropriate laboratory equipment in the classroom, and the results are reviewed by the teacher. Exercises: These are intended to be completed individually at home using the conclusions drawn from the Activities. As you complete these pages, The elements in a circuit are drawn: o o A battery looks like this: The longer line indicates the positive (+) terminal; the shorter line indicates the negative ( ) terminal. A light bulb looks like this: When the instructions ask to rank, use order symbols such as <,, =,, and >. Be precise (for example, < and are different and are not interchangeable). o Bulb A = Bulb B < Bulb C = Bulb D When the instructions ask to describe or explain (i.e. whenever the response space uses a dotted line ), write your response in a complete sentence, using prepositional phrases to precisely describe the subject. Avoid using pronouns (i.e. it, they). Here are poor responses: o o o Nothing. It was bright. The current is bigger. Here are some better responses: o o The bulbs did not light up. Bulb A lit up brightly. o The current through bulb A is greater than that through bulb B. A note about prepositions: o Resistance: The resistance of bulb X o Potential difference: The potential difference across bulb X o Current: The current through bulb X These activities and exercises are challenging. Do not merely go through the motions to simply complete them. Take the time to develop a mental model of what is going on. 1

2 Class Summaries Current Resistance Potential Difference Single Bulb In Series In Parallel This tutorial and exercises are adapted from: McDermott, Lillian, Peter S. Shaffer, and the Physics Education Group. Tutorials in Introductory Physics. 1 st Ed. Upper Saddle River, New Jersey: Prentice-Hall, Inc., Print. McDermott, Lillian, Peter S. Shaffer, and the Physics Education Group. Tutorials in Introductory Physics: Homework. 1 st Ed. Upper Saddle River, New Jersey: Prentice-Hall, Inc., Print. 2

3 Activity 1: Complete Circuits (in class) 1. With just one wire, one light bulb, and one battery, make the light bulb light. Connect these in a variety of ways. a. Sketch at least four arrangements that light the bulb, and at least four arrangements that do not light the bulb. A battery looks like: A bulb looks like: Wire looks like: Arrangements that do light the bulb Arrangements that do not light the bulb b. What two parts of the bulb need to be touched by the wire in order for the bulb to light? (1) (2) c. What two parts of the battery need to be touched by the wire in order for the bulb to light? (1) (2) d. State the requirements that must be met in order for the bulb to light. e. When the bulb is lit, you created a circuit. Why is circuit a particularly good name for this? 3

4 2. A student has briefly connected a wire across the terminals of a battery until the wire feels warm. The student finds that the wire seems to be equally warm at points 1, 2, and 3. Based on this observation, what might you conclude about the current through the wire at one place compared to another? Light a bulb using a battery and a single wire. a. Observe and record the brightness of the bulb (i.e. dark, dim, bright) when objects made out of various materials (e.g. paper, coins, pencil, lead, eraser, your finger) are inserted into the circuit. Material Brightness b. What is similar about most of the objects that let the bulb light? 4. Carefully examine a bulb. Two wires extend from the filament of the bulb into the base. You probably cannot see into the base, however, you should be able to make a good guess as to where the wires are attached. a. Draw how the wires are attached in the bulb to the right. b. Describe where the wires are attached. Explain based on your observations in parts 1-3. On the basis of the observations that we have made, we will make the following assumptions: A flow exists in a complete circuit from one terminal of the battery, through the rest of the circuit, back to the other terminal of the battery, through the battery, and back around the circuit. We will call this flow electric current. For identical bulbs, bulb brightness can be used as an indicator of the amount of current through the bulb: the brighter the bulb, the greater the current. More flow, more glow! Starting with these assumptions, we will develop a model that we can use to account for the behavior of simple circuits. The construction of a scientific model is a step-by-step process in which we specify only the minimum number of attributes that are needed to account for the phenomena under consideration. 4

5 Activity 2: Current and Resistance of Bulbs in Series (in class) 1. Set up a two-bulb circuit with identical bulbs connected one after the other as shown. Bulbs connected in this way are said to be connected in series. a. Describe the brightness of the two bulbs (i.e. dark, dim, or bright). Bulb A is. Bulb B is. A B The brightness of Bulb A is roughly [ less than the same as greater than ] that of Bulb B. b. Is the current used up in one bulb, or is the current the same through both bulbs? c. Do you think that switching the order of the bulb might make a difference? [ Yes No ] Check your answer. Did it make a difference? [ Yes No ] d. On the basis of your observations alone, can you tell the direction of the flow through the circuit? [ Yes No ] 2. Set up a single-bulb circuit, as shown on the right. a. Rank Bulbs A, B, and C in order of increasing brightness. C b. How does the current through a bulb in a single-bulb circuit compare with the current through the same bulb when it is connected in series with a second circuit? Explain your reasoning based on part a. c. How does the current through the battery in a single-bulb circuit compare to the current through the battery in a two-bulb series circuit? Explain your reasoning based on part b. d. We may think of a bulb as presenting an obstacle, or resistance, to the current in the circuit. Would adding more bulbs cause the total resistance to increase, decrease, or stay the same as before? e. Formulate a rule for predicting how the current through the battery would change (i.e. whether it would increase, decrease, or remain the same) if the number of bulbs connected in series were increased or decreased. 5

6 Activity 3: Current and Resistance of Bulbs in Parallel (in class) 1. Set up a two-bulb circuit with identical bulbs so that their terminals are connected together as shown. Bulbs connected together in this way are said to be connected in parallel. a. Describe the brightness of the two bulbs (i.e. dark, dim, or bright). Bulb D is. Bulb E is. The brightness of Bulb D is roughly [ less than the same as greater than ] that of Bulb E. D E b. Describe the current through the entire circuit based on your observations. Specifically, describe the current through the battery, through bulb D, and through bulb E. How does the current through the battery seem to divide and recombine at the junctions of the two parallel branches? 2. Compare the bulbs in the single-bulb circuit (Bulb C) and the bulbs in the two-bulb parallel circuit (Bulbs D and E). a. Rank Bulbs C, D, and E in order of increasing brightness. b. How does the current through the battery in a single-bulb circuit compare to the current through the battery in a two-bulb parallel circuit? Explain your reasoning based on your observations. c. Formulate a rule for predicting how the current through the battery would change (i.e. whether it would increase, decrease, or remain the same) if the number of bulbs connected in parallel were increased or decreased based on your observation of the behavior of the two-bulb parallel circuit and the model for current. d. How does the total resistance of a circuit change as the number of parallel branches is increased or decreased? 6

7 Activity 4: Formulating our Model (in class) 1. How does the amount of current through a battery depend on the number of bulbs in the circuit and how they are connected? 2. Unscrew one of the bulbs in the two-bulb parallel circuit. How does this change affect the current through the branch that contains the other bulb? A characteristic of an ideal battery is that the branches connected directly across it are independent of one another. 3. The circuit on the right contains three identical bulbs and an ideal battery. Assume that the resistance of the switch, when closed, is negligible. a. Without setting up the circuit, make a prediction and rank the brightness of the bulbs in the circuit with the switch closed. F G H b. Explain your ranking above. c. Predict how the brightness of bulb F changes when the switch is opened. d. Predict how the brightness of bulb G changes when the switch is opened. 7

8 Exercises A: Current and Resistance (at home) 1. In the diagrams, boxes have been drawn around the networks of bulbs in each circuit. On the basis of your observations and the rule you developed relating current through the battery to total resistance, rank the networks (boxes) A C according to their equivalent resistance. Explain your reasoning based on the model. (Do not use math.) 2. Use the model for electric current, rank the networks shown below in order of increasing resistance. 3. The circuit shown has four identical light bulbs and an ideal battery. Rank the brightness of the bulbs. 8

9 4. A wire is now added to the circuit from part 3 above as shown to the right. a. The brightness of Bulb C [ increases remains the same decreases ]. b. The brightness of Bulb A [ increases remains the same decreases ]. c. The current through the battery [ increases remains the same decreases ]. 5. Consider the five networks shown to the right. a. Rank the networks according to their equivalent resistance. (Hint: Imagine placing each network in series with an indicator bulb and a battery.) b. How does adding a single bulb to the circuit in series with another bulb or network affect the resistance of the circuit? c. How does adding a single bulb to a circuit in parallel with another bulb or network affect the resistance of the circuit? 9

10 6. The networks A-E in part 5 (above) are connected, in turn, to identical batteries as shown. Use the model we have developed to: a. Rank the circuits according to equivalent resistance. b. Rank the circuits according to the current through the battery. 7. The circuit to the right shows four identical bulbs connected to an ideal battery. a. Rank the bulbs in order from brightest to dimmest. Explain how you determined the ranking. b. Suppose that a switch has been added to the circuit as shown. When the switch is opened, the current through bulb A will [ increase remain the same decrease ]. 10

11 Activity 5: Current and Resistance (in class) Do not set up any circuits for this Activity. 1. The circuits at the right contain identical batteries, bulbs and unknown identical elements labeled X. a. How do the bulbs compare in brightness? b. In each circuit, how does the current through the bulb compare to the current through element X? 2. The circuits at the right contain identical batteries and bulbs. The boxes labeled X and Y represent different unknown elements. (Assume there are no batteries in either box.) It is observed that the bulb on the left is brighter than the bulb on the right. a. Based on this observation, how does the resistance of element X compare to that of element Y? b. In each circuit, how does the current through the bulb compare to the current through the unknown element? c. In each circuit, how does the current through the bulb compare to the current through the battery? 3. A dashed box has been drawn around the network of circuit elements that is in series with each of these bulbs, B 1, B 2, and B 3. a. Predict the relative brightness of bulbs B 1, B 2, and B 3 in the circuits shown. b. How do the currents through the batteries compare? 11

12 Activity 6: Potential Difference (in class) Use two batteries in the circuits for this Activity. 1. Set up the circuit with a single bulb and the battery combination as shown. a. Connect each probe of the voltmeter to a different terminal of the battery to measure the potential difference across the battery. Then make a similar potential difference measurement across the bulb. b. How does the potential difference across Bulb A compare to the potential difference across the battery? V battery A V Bulb A 2. Set up the circuit containing two bulbs in series as shown. a. Rank from largest to smallest the currents through bulbs A, B, and C. B C b. Measure the potential difference across each element in the circuit. V battery V Bulb B V Bulb C c. How does the potential difference across the battery in this circuit compare to the potential difference across the battery in the single-bulb circuit (part 1a)? d. Rank the potential differences across bulbs A, B, and C. e. What is the relationship between the brightness of the bulb and the potential difference? 3. Suppose you measured the potential difference across both bulbs B and C, at the points indicated. a. Predict what the voltmeter would read. B C b. How does the potential difference across the network of bulbs compare to the potential difference across the battery? 12

13 4. Set up the circuit with two bulbs in parallel as shown. a. Rank the current through bulbs A, D, and E. D E b. Measure the potential difference across each circuit element. V battery V Bulb D V Bulb E c. How does the potential difference across the battery in this circuit compare to the potential difference across the battery in the single-bulb circuit? d. Rank the potential difference across bulbs A, D, and E. e. What is the relationship between the brightness of the bulb and the potential difference? 5. Answer the following questions based on the measurements you have made so far. a. Does the current through the battery depend on the circuit to which it is connected? [ Yes No ] b. Does the potential difference across the battery depend on the circuit to which it is connected? [ Yes No ] 13

14 Activity 7: Extending the Model (in class) Our model for electric circuits includes the idea that, for identical bulbs, the brightness of a bulb is an indicator of the current through the bulb. Based on our observations, we can extend the model to include the idea that, for circuits containing identical bulbs, the brightness of a bulb is also an indicator of the potential difference across the bulb. 1. Set up the circuit with three bulbs as shown and observe their brightness. a. Without making voltage measurements, predict the ranking of the potential difference across the battery and each bulb for the circuit on the right. F G H b. Measure the potential difference across each element in the circuit. Make sure your measurements are consistent with your predictions. V battery V Bulb F V Bulb G V Bulb H 2. Consider the circuit to the right. a. Without setting up the circuit, predict the ranking of the currents through the battery and each bulb (I battery, I Bulb J, I Bulb K, I Bulb L). J K L b. Predict the voltmeter measurements across each of the elements in the circuit shown. V battery V Bulb J V Bulb K V Bulb L c. Set up the circuit and check your predictions. Make sure your measurements are consistent with your predictions. V battery V Bulb J V Bulb K V Bulb L 14

15 3. Both circuits have more than one path for the current. a. Sketch the possible current loops on the diagrams. (A current loop is a single path of conductors that connect one side of the battery to the other.) Then for each loop, calculate the sum of the potential differences across the bulbs in that loop using the measurements you made. Current Loop Sum of V b. How do the sums of the potential differences across the bulbs in each loop compare to the potential difference across the battery? 15

16 Exercises B: Potential Difference (at home) 1. The circuit to the right consists of a bulb in series with an electrical black box. The following are possible contents for the black box. All the bulbs are identical. Box C consists of a single piece of wire. Suppose that each of the five boxes is placed, in turn, into the circuit. (Only one box is in the circuit at a time.) a. Draw the five circuit diagrams below. Show the contents of the boxes in place of the box itself. b. Rank the five circuits according to the brightness of the indicator bulb in those circuits. c. Rank the boxes according to their equivalent resistance. 16

17 Parts 2-4: Box A and box B contain unknown combinations of light bulbs. Bulb 1 is identical to bulb 2. The batteries are ideal. 2. In the circuit to the right, the voltage across bulb 1 and the voltage across box A are equal. a. What, if anything, can you say about the resistance of box A compared to the resistance of bulb 1? b. Write an expression for the voltage across the battery (V batt) in terms of the voltage readings across box A and across the bulb (V Box A,V Bulb 1). 3. In the circuit to the right, the voltage across bulb 2 and the voltage across box B are equal. a. What, if anything, can you say about the resistance of box B compared to the resistance of bulb 2? b. Write an expression for the voltage across the battery (V batt) in terms of the voltage readings across box B and across the bulb (V Box B, V Bulb 2). 4. Box A and box B are now interchanged. It is observed that bulb 2 is now brighter than it was when box B was in that circuit. a. The resistance of box A is [ greater than, equal to, less than ] the resistance of box B. b. The current through battery 1 has [ increased remained the same decreased ]. c. The current through battery 2 has [ increased remained the same decreased ]. 17

18 5. The bulbs in the circuit to the right are identical and the battery is ideal. a. Rank bulbs A, B, and C in increasing brightness. b. Rank the voltages across the bulbs. c. Write an equation that relates the voltage across bulbs A and B to the battery voltage. d. The voltage across bulb A is [ greater than, equal to, less than ] one-half the battery voltage. 6. Suppose a student cuts the wire in the circuit from part 5 as shown to the right. a. Rank the bulbs A, B, and C in increasing brightness. b. Rank the voltages across the bulbs. c. Write an equation that relates the voltage across bulbs A and B to the battery voltage. d. The voltage across bulb A is [ greater than, equal to, less than ] one-half the battery voltage. 18

19 7. Consider the following discussion between two students regarding the change in the circuit when the wire in the circuit is cut, from part 6. Student 1: I think that bulb B will get brighter. Bulb B used to share the current with bulb C, but now it gets all the current. So bulb B will get brighter. Student 2: I don t think so. Now there aren t as many paths for the current, so the resistance in the circuit has increased. Since the resistance in the circuit has gone up, the current in the circuit decreases. Bulb B will get dimmer. a. Is Student 1 correct? Why or why not? b. Is Student 2 correct? Why or why not? c. Bulb B will [ become brighter stay the same brightness become dimmer ] when the wire is cut. 19

20 8. The bulbs in the circuit shown to the right are identical. Assume that the battery is ideal. a. Rank bulbs 1-6 in increasing brightness. b. Rank the voltages across the bulbs. c. Write an equation that relates the voltage across bulbs 3, 5, and 6 to the battery voltage. 9. Bulb 1 from the circuit in part 8 is removed from its socket as shown to the right. a. The brightness of bulb 2 [ increases remains the same decreases ]. b. The brightness of bulb 6 [ increases remains the same decreases ]. c. The brightness of bulb 3 [ increases remains the same decreases ]. 20

Objectives. to understand qualitatively current flow through circuit elements connected in series and parallel

Objectives. to understand qualitatively current flow through circuit elements connected in series and parallel UNIT 8 DIRECT CURRENT CIRCUITS: CURRENT (from Lillian C. McDermott and the Physics Education Group, Physics by Inquiry Volume II, John Wiley and Sons, NY, 1996) Objectives to understand qualitatively current

More information

A model for circuits part 2: Potential difference

A model for circuits part 2: Potential difference A model for circuits part 2: Potential difference I. Using the CCK simulation The Circuit Construction Kit (CCK) accurately simulates the behavior of electrical circuits. Hints for use: Right-click on

More information

Gr. 11 Physics Electricity

Gr. 11 Physics Electricity Gr. 11 Physics Electricity This chart contains a complete list of the lessons and homework for Gr. 11 Physics. Please complete all the worksheets and problems listed under Homework before the next class.

More information

Activity 4: The Electric-Circuit Interaction

Activity 4: The Electric-Circuit Interaction RECORD SHEET Activity 4: The Electric-Circuit Interaction Name Date Class Key Questions 1. 2. Explore Your Ideas Experiment 1: When does an electric-circuit interaction occur? 1. Draw a picture of the

More information

Name Date Time to Complete. NOTE: The multimeter s 10 AMP range, instead of the 300 ma range, should be used for all current measurements.

Name Date Time to Complete. NOTE: The multimeter s 10 AMP range, instead of the 300 ma range, should be used for all current measurements. Name Date Time to Complete h m Partner Course/ Section / Grade Complex Circuits In this laboratory you will continue your exploration of dc electric circuits with a steady current. The circuits will be

More information

Lab 8 Simple Electric Circuits

Lab 8 Simple Electric Circuits Lab 8 Simple Electric Circuits INTRODUCTION When we talk about the current in a river, we are referring to the flow of water. Similarly, when we refer to the electric current in a circuit, we are talking

More information

2. In words, what is electrical current? 3. Try measuring the current at various points of the circuit using an ammeter.

2. In words, what is electrical current? 3. Try measuring the current at various points of the circuit using an ammeter. PS 12b Lab 1a Fun with Circuits Lab 1a Learning Goal: familiarize students with the concepts of current, voltage, and their measurement. Warm Up: A.) Given a light bulb, a battery, and single copper wire,

More information

Name Date Time to Complete

Name Date Time to Complete Name Date Time to Complete h m Partner Course/ Section / Grade Complex Circuits In this laboratory you will connect electric lamps together in a variety of circuits. The purpose of these exercises is to

More information

Objectives. to be able to represent a magnetic field at a point with a vector. to understand how to represent a magnetic field with field lines

Objectives. to be able to represent a magnetic field at a point with a vector. to understand how to represent a magnetic field with field lines UNIT 14 MAGNETIC FIELDS (from Lillian C. McDermott, Peter S. Shaffer and the Physics Education Group, Tutorials in Introductory Physics (Homework), Prentice Hall, NJ, 1998) Objectives to understand the

More information

Lab 3 Parallel Circuits

Lab 3 Parallel Circuits Lab 3 Parallel Circuits!!! RED THIS PGE!!!! When a wire or light bulb is connected across a battery, we have evidence that something is happening in the circuit. The wire gets warm. The bulb glows. In

More information

Power lines. Why do birds sitting on a high-voltage power line survive?

Power lines. Why do birds sitting on a high-voltage power line survive? Power lines At large distances, the resistance of power lines becomes significant. To transmit maximum power, is it better to transmit high V, low I or high I, low V? (a) high V, low I (b) low V, high

More information

Agenda for Today. Elements of Physics II. Resistance Resistors Series Parallel Ohm s law Electric Circuits. Current Kirchoff s laws

Agenda for Today. Elements of Physics II. Resistance Resistors Series Parallel Ohm s law Electric Circuits. Current Kirchoff s laws Resistance Resistors Series Parallel Ohm s law Electric Circuits Physics 132: Lecture e 17 Elements of Physics II Current Kirchoff s laws Agenda for Today Physics 201: Lecture 1, Pg 1 Clicker Question

More information

Physics 9 Monday, April 7, 2014

Physics 9 Monday, April 7, 2014 Physics 9 Monday, April 7, 2014 Handing out HW11 today, due Friday. Finishes induced emf; starts circuits. For today: concepts half of Ch31 (electric circuits); read equations half for Wednesday. Annotated

More information

Sierzega: DC Circuits 4 Searching for Patterns in Series and Parallel Circuits

Sierzega: DC Circuits 4 Searching for Patterns in Series and Parallel Circuits Searching for Series and Parallel Circuits. Observe and Design Draw circuit diagrams according to the word descriptions below. Build the circuits and use the symbols to represent the battery and the light

More information

1) Two lightbulbs, one rated 30 W at 120 V and another rated 40 W at 120 V, are arranged in two different circuits.

1) Two lightbulbs, one rated 30 W at 120 V and another rated 40 W at 120 V, are arranged in two different circuits. 1) Two lightbulbs, one rated 30 W at 120 V and another rated 40 W at 120 V, are arranged in two different circuits. a. The two bulbs are first connected in parallel to a 120 V source. i. Determine the

More information

Notebook Circuits With Metering. 22 February July 2009

Notebook Circuits With Metering. 22 February July 2009 Title: Original: Revision: Authors: Appropriate Level: Abstract: Time Required: NY Standards Met: 22 February 2007 14 July 2009 Notebook Circuits With Metering Jim Overhiser, Monica Plisch, and Julie Nucci

More information

INQUIRY-BASED EXPERIMENTS IN THE INTRODUCTORY PHYSICS LABORATORY

INQUIRY-BASED EXPERIMENTS IN THE INTRODUCTORY PHYSICS LABORATORY INQUIRY-BASED EXPERIMENTS IN THE INTRODUCTORY PHYSICS LABORATORY Robert Ross 1 Abstract This paper will describe a significant effort to improve the second semester general physics laboratory at the University

More information

Circuit 3. Name Student ID

Circuit 3. Name Student ID Name Student ID last first Score II. [10 pts total] The following questions are based on your experience in the lab. The questions are not related to each other. Please assume that all batteries are ideal

More information

Physics Circuits: Series

Physics Circuits: Series FACULTY OF EDUCATION Department of Curriculum and Pedagogy Physics Circuits: Series Science and Mathematics Education Research Group Supported by UBC Teaching and Learning Enhancement Fund 2012-2013 Series

More information

Tactics Box 23.1 Using Kirchhoff's Loop Law

Tactics Box 23.1 Using Kirchhoff's Loop Law PH203 Chapter 23 solutions Tactics Box 231 Using Kirchhoff's Loop Law Description: Knight/Jones/Field Tactics Box 231 Using Kirchhoff s loop law is illustrated Learning Goal: To practice Tactics Box 231

More information

Fundamentals of Circuits I: Current Models, Batteries & Bulbs

Fundamentals of Circuits I: Current Models, Batteries & Bulbs Name: Lab Partners: Date: Pre-Lab Assignment: Fundamentals of Circuits I: Current Models, Batteries & Bulbs (Due at the beginning of lab) 1. Explain why in Activity 1.1 the plates will be charged in several

More information

Introduction. Pre-lab questions: Physics 1BL KIRCHOFF S RULES Winter 2010

Introduction. Pre-lab questions: Physics 1BL KIRCHOFF S RULES Winter 2010 Introduction In this lab we will examine more complicated circuits. First, you will derive an expression for equivalent resistance using Kirchhoff s Rules. Then you will discuss the physics underlying

More information

ConcepTest Clicker Questions. Chapter 26 Physics: for Scientists & Engineers with Modern Physics, 4th edition Giancoli

ConcepTest Clicker Questions. Chapter 26 Physics: for Scientists & Engineers with Modern Physics, 4th edition Giancoli ConcepTest Clicker Questions Chapter 26 Physics: for Scientists & Engineers with Modern Physics, 4th edition Giancoli 2008 Pearson Education, Inc. This work is protected by United States copyright laws

More information

Circuits. PHY2054: Chapter 18 1

Circuits. PHY2054: Chapter 18 1 Circuits PHY2054: Chapter 18 1 What You Already Know Microscopic nature of current Drift speed and current Ohm s law Resistivity Calculating resistance from resistivity Power in electric circuits PHY2054:

More information

52 VOLTAGE, CURRENT, RESISTANCE, AND POWER

52 VOLTAGE, CURRENT, RESISTANCE, AND POWER 52 VOLTAGE, CURRENT, RESISTANCE, AND POWER 1. What is voltage, and what are its units? 2. What are some other possible terms for voltage? 3. Batteries create a potential difference. The potential/voltage

More information

Clicker Session Currents, DC Circuits

Clicker Session Currents, DC Circuits Clicker Session Currents, DC Circuits Wires A wire of resistance R is stretched uniformly (keeping its volume constant) until it is twice its original length. What happens to the resistance? 1) it decreases

More information

Physics Tutorial - Currents and Circuits

Physics Tutorial - Currents and Circuits Question 1: Ion Channels Physics Tutorial - Currents and Circuits The biochemistry that takes place inside cells depends on various elements that are dissolved in water as ions. The ions enter cells through

More information

An Introduction to Electricity and Circuits

An Introduction to Electricity and Circuits An Introduction to Electricity and Circuits Materials prepared by Daniel Duke 4 th Sept 2013. This document may be copied and edited freely with attribution. This course has been designed to introduce

More information

physics 4/7/2016 Chapter 31 Lecture Chapter 31 Fundamentals of Circuits Chapter 31 Preview a strategic approach THIRD EDITION

physics 4/7/2016 Chapter 31 Lecture Chapter 31 Fundamentals of Circuits Chapter 31 Preview a strategic approach THIRD EDITION Chapter 31 Lecture physics FOR SCIENTISTS AND ENGINEERS a strategic approach THIRD EDITION randall d. knight Chapter 31 Fundamentals of Circuits Chapter Goal: To understand the fundamental physical principles

More information

ConcepTest PowerPoints

ConcepTest PowerPoints ConcepTest PowerPoints Chapter 19 Physics: Principles with Applications, 6 th edition Giancoli 2005 Pearson Prentice Hall This work is protected by United States copyright laws and is provided solely for

More information

Chapter 22: Current and Resistance Solutions

Chapter 22: Current and Resistance Solutions Chapter 22: Current and esistance Solutions Questions: 4, 7, 17, 21 Exercises & Problems: 1, 16, 22, 28, 36, 38, 51, 53, 55 Q22.4: A lightbulb is connected to a battery by two copper wires of equal lengths

More information

1. How does a light bulb work?

1. How does a light bulb work? AP Physics 1 Lesson 12.a Electric Current and Circuits Outcomes 1. Determine the resistance of a resistor given length, cross-sectional area and length. 2. Relate the movement of charge to differences

More information

ConcepTest PowerPoints

ConcepTest PowerPoints ConcepTest PowerPoints Chapter 16 Physics: Principles with Applications, 7 th edition Giancoli 2014 Pearson Education, Inc. This work is protected by United States copyright laws and is provided solely

More information

Electrical Circuits. Winchester College Physics. makptb. c D. Common Time man. 3rd year Revision Test

Electrical Circuits. Winchester College Physics. makptb. c D. Common Time man. 3rd year Revision Test Name... Set... Don.... manner~ man makptb Winchester College Physics 3rd year Revision Test Electrical Circuits Common Time 2011 Mark multiple choice answers with a cross (X) using the box below. I A B

More information

Electricity and Magnetism Module 4 Student Guide

Electricity and Magnetism Module 4 Student Guide Electricity and Magnetism Module 4 Student Guide Note: each time you are finished with a circuit we ask that you disconnect all wires, so that the next circuit you investigate starts with a blank slate.

More information

Capacitance. A different kind of capacitor: Work must be done to charge a capacitor. Capacitors in circuits. Capacitor connected to a battery

Capacitance. A different kind of capacitor: Work must be done to charge a capacitor. Capacitors in circuits. Capacitor connected to a battery Capacitance The ratio C = Q/V is a conductor s self capacitance Units of capacitance: Coulomb/Volt = Farad A capacitor is made of two conductors with equal but opposite charge Capacitance depends on shape

More information

Activity 1: Evidence of Interactions

Activity 1: Evidence of Interactions UNIT 1 CHAPTER 2 Activity 1: Evidence of Interactions Name Date Class Key Questions Chapter Activity I Think Fill in the evidence of the following interactions. Demonstration A Time Interval: while the

More information

Calculate the potential difference across the 45 Ω resistor

Calculate the potential difference across the 45 Ω resistor Q1.A student set up the electrical circuit shown in the figure below. (a) The ammeter displays a reading of 0.10 A. Calculate the potential difference across the 45 Ω resistor. Potential difference =...

More information

(b) State the relation between work, charge and potential difference for an electric circuit.

(b) State the relation between work, charge and potential difference for an electric circuit. Question Bank on Ch-Electricity 1. (a) Define the S.I unit of potential difference. (b) State the relation between work, charge and potential difference for an electric circuit. Calculate the potential

More information

Addressing Learning Difficulties with Circuits: An Aufbau* Approach

Addressing Learning Difficulties with Circuits: An Aufbau* Approach Addressing Learning Difficulties with Circuits: An Aufbau* Approach David E. Meltzer Department of Physics and Astronomy Iowa State University * Aufbau = building up as in, e.g., atomic physics. Research

More information

b. Which bulb is brightest? Justify your answer.

b. Which bulb is brightest? Justify your answer. Physics 2080 Final Exam Problems Due April 28, 2011 Instructions: This is part of the final exam. Books and notes are allowed, but all work should be YOUR OWN. Do not work in groups; every student should

More information

Name... Class... Date...

Name... Class... Date... The power of lamps Specification references: P2.4.1 Power P2.4.2 Energy transfers in everyday appliances (part) MS 1a, 2a, 3b, 3c, 3d WS 1.2, 2.6, 3.1, 3.3 Aims In this practical, you will observe the

More information

Physics 2020 Lab 5 Intro to Circuits

Physics 2020 Lab 5 Intro to Circuits Physics 2020 Lab 5 Intro to Circuits Name Section Tues Wed Thu 8am 10am 12pm 2pm 4pm Introduction In this lab, we will be using The Circuit Construction Kit (CCK). CCK is a computer simulation that allows

More information

Electric Field Mapping

Electric Field Mapping Electric Field Mapping Objectives To determine the equipotential lines and the corresponding electric field lines for a variety of arrangements of conductors in a plane. Theory The concept of an electric

More information

Title of Activity: Let there be Light! Introduction to Ohm's Law and basic series circuits.

Title of Activity: Let there be Light! Introduction to Ohm's Law and basic series circuits. Title of Activity: Let there be Light! Introduction to Ohm's Law and basic series circuits. Concepts Covered: Circuitry is in all of our electronics. This circuits must be asembled in specific ways to

More information

A Deeper Look at Electricity A First Look at Magnets. NBSP Physical Science Institute Tuesday July 23, 2002

A Deeper Look at Electricity A First Look at Magnets. NBSP Physical Science Institute Tuesday July 23, 2002 A Deeper Look at Electricity A First Look at Magnets NBSP Physical Science Institute Tuesday July 23, 2002 1 Currents: Thinking Deeper Our model for current so far: The current in a circuit depends on

More information

Electrical Circuits Question Paper 1

Electrical Circuits Question Paper 1 Electrical Circuits Question Paper 1 Level IGCSE Subject Physics Exam Board CIE Topic Electricity and Magnetism Sub-Topic Electrical Circuits Paper Type Alternative to Practical Booklet Question Paper

More information

Capacitors GOAL. EQUIPMENT. CapacitorDecay.cmbl 1. Building a Capacitor

Capacitors GOAL. EQUIPMENT. CapacitorDecay.cmbl 1. Building a Capacitor PHYSICS EXPERIMENTS 133 Capacitor 1 Capacitors GOAL. To measure capacitance with a digital multimeter. To make a simple capacitor. To determine and/or apply the rules for finding the equivalent capacitance

More information

Magnetism and Electricity Unit Design Rev9.08 Grade 5

Magnetism and Electricity Unit Design Rev9.08 Grade 5 Magnetism and Electricity Unit Design Rev9.08 Grade 5 RI Statements of Enduring Knowledge - (Established Goals): PS 1 Energy is necessary for change to occur in matter. Energy can be stored, transferred,

More information

Energy Conservation in Circuits Final Charge on a Capacitor. Recorder Manager Skeptic Energizer

Energy Conservation in Circuits Final Charge on a Capacitor. Recorder Manager Skeptic Energizer Energy Conservation in Circuits Final Charge on a Capacitor Recorder Manager Skeptic Energizer Using an ammeter Set up a digital multimeter to be an ammeter. Since you will be measuring currents larger

More information

Unit 2: Electricity Wires, Bulbs, and Batteries!

Unit 2: Electricity Wires, Bulbs, and Batteries! Unit 2: Electricity Wires, Bulbs, and Batteries! Name: Period: Section 1: What is Happening in the Wires? 1. Lab Exercises a. Investigation 1: What is Needed to Light a Bulb? b. Investigation 2: Is Anything

More information

Lab 4. Current, Voltage, and the Circuit Construction Kit

Lab 4. Current, Voltage, and the Circuit Construction Kit Physics 2020, Spring 2009 Lab 4 Page 1 of 8 Your name: Lab section: M Tu Wed Th F TA name: 8 10 12 2 4 Lab 4. Current, Voltage, and the Circuit Construction Kit The Circuit Construction Kit (CCK) is a

More information

Figure 1: Capacitor circuit

Figure 1: Capacitor circuit Capacitors INTRODUCTION The basic function of a capacitor 1 is to store charge and thereby electrical energy. This energy can be retrieved at a later time for a variety of uses. Often, multiple capacitors

More information

For an electric current to flow between two points, two conditions must be met.

For an electric current to flow between two points, two conditions must be met. ELECTROSTATICS LAB Electric Circuits For an electric current to flow between two points, two conditions must be met. 1. There must be a conducting path between the points along which the charges can move.

More information

Section 3. Series and Parallel Circuits: Lighten Up. What Do You See? What Do You Think? Investigate

Section 3. Series and Parallel Circuits: Lighten Up. What Do You See? What Do You Think? Investigate Section 3 Series and Parallel Circuits: Lighten Up Florida Next Generation Sunshine State Standards: Additional Benchmarks met in Section 3 What Do You See? SC.912.N.2.4 Explain that scientific knowledge

More information

Current Electricity. ScienceLinks 9, Unit 4 SciencePower 9, Unit 3

Current Electricity. ScienceLinks 9, Unit 4 SciencePower 9, Unit 3 Current Electricity ScienceLinks 9, Unit 4 SciencePower 9, Unit 3 Current Electricity The flow of negative charges (electrons) through conductors Watch the BrainPOPs: Electricity Current Electricity Activity:

More information

PHY152H1S Practicals 4 and 5: Electric Potential, Electric Field

PHY152H1S Practicals 4 and 5: Electric Potential, Electric Field PHY152H1S Practicals 4 and 5: Electric Potential, Electric Field Don t forget: List the NAMES of all participants on the first page of each day s write-up. Note if any participants arrived late or left

More information

(d) Fill in the table below with some other symbols: Part of Circuit Sketch Schematic Symbol Notes (what does this element do?

(d) Fill in the table below with some other symbols: Part of Circuit Sketch Schematic Symbol Notes (what does this element do? uggé: DC Circuits 2 Learning the Language for DC Circuits 2.1 Circuit Diagrams (a) circuit diagram is a representation that uses symbols to show the components in a circuit and how they are connected:

More information

Circuits. 1. The Schematic

Circuits. 1. The Schematic + ircuits 1. The Schematic 2. Power in circuits 3. The Battery 1. eal Battery vs. Ideal Battery 4. Basic ircuit nalysis 1. oltage Drop 2. Kirchoff s Junction Law 3. Series & Parallel 5. Measurement Tools

More information

MasteringPhysics: Assignment Print View. Problem 30.50

MasteringPhysics: Assignment Print View. Problem 30.50 Page 1 of 15 Assignment Display Mode: View Printable Answers phy260s08 homework 13 Due at 11:00pm on Wednesday, May 14, 2008 View Grading Details Problem 3050 Description: A 15-cm-long nichrome wire is

More information

Brian Blais Quick Homemade Guide to Circuits

Brian Blais Quick Homemade Guide to Circuits Brian Blais Quick Homemade Guide to Circuits 1 Initial Equations and Concepts Current, I. Units:amps rate of flow of charge: I = Q/ t Potential difference, V. Units: volts esistance,. Units:ohms Ohm s

More information

NORTHERN ILLINOIS UNIVERSITY PHYSICS DEPARTMENT. Physics 211 E&M and Quantum Physics Spring Lab #4: Electronic Circuits I

NORTHERN ILLINOIS UNIVERSITY PHYSICS DEPARTMENT. Physics 211 E&M and Quantum Physics Spring Lab #4: Electronic Circuits I NORTHERN ILLINOIS UNIVERSITY PHYSICS DEPARTMENT Physics 211 E&M and Quantum Physics Spring 2018 Lab #4: Electronic Circuits I Lab Writeup Due: Mon/Wed/Thu/Fri, Feb. 12/14/15/16, 2018 Background The concepts

More information

Farr High School HIGHER PHYSICS. Unit 3 Electricity. Question Booklet

Farr High School HIGHER PHYSICS. Unit 3 Electricity. Question Booklet Farr High School HIGHER PHYSICS Unit 3 Electricity Question Booklet 1 MONITORING ND MESURING.C. 1. What is the peak voltage of the 230 V mains supply? The frequency of the mains supply is 50 Hz. How many

More information

Electric Fields. Goals. Introduction

Electric Fields. Goals. Introduction Lab 2. Electric Fields Goals To understand how contour lines of equal voltage, which are easily measured, relate to the electric field produced by electrically charged objects. To learn how to identify

More information

PHYS 1444 Section 02 Review #2

PHYS 1444 Section 02 Review #2 PHYS 1444 Section 02 Review #2 November 9, 2011 Ian Howley 1 1444 Test 2 Eq. Sheet Terminal voltage Resistors in series Resistors in parallel Magnetic field from long straight wire Ampére s Law Force on

More information

Parallel Resistors (32.6)

Parallel Resistors (32.6) Parallel Resistors (32.6) Resistors connected at both ends are called parallel resistors The important thing to note is that: the two left ends of the resistors are at the same potential. Also, the two

More information

Instructors Guide: Introduction to Voltaic Cells

Instructors Guide: Introduction to Voltaic Cells Instructors Guide: Introduction to Voltaic Cells Standards Connections: Connections to NSTA Standards for Science Teacher Preparation C.3.a.8 Oxidation reduction chemistry. Connections to the National

More information

3.14 mv ma. Objectives. Overview

3.14 mv ma. Objectives. Overview Phys 3 Lab 7 Ch 0 Simple DC and RC Circuits Equipment: power supply, banana cables, circuit board, switch, 0, 70, 460, & 30, k,two multi-meters, differential voltage probe, Phys 3 experiment kits: batteries

More information

Take the Anxiety Out of Word Problems

Take the Anxiety Out of Word Problems Take the Anxiety Out of Word Problems I find that students fear any problem that has words in it. This does not have to be the case. In this chapter, we will practice a strategy for approaching word problems

More information

Parallel Resistors (32.6)

Parallel Resistors (32.6) Parallel Resistors (32.6) Resistors connected at both ends are called parallel resistors Neil Alberding (SFU Physics) Physics 121: Optics, Electricity & Magnetism Spring 2010 1 / 1 Parallel Resistors (32.6)

More information

CIRCUITS: Series & Parallel

CIRCUITS: Series & Parallel CIRCUITS: Series & Parallel Last Week s BIG IDEAS: Opposite charged objects attract Like charged objects repel Last Week s BIG IDEAS: The electrons are the loose particles that move to make things charged

More information

2 Electric Field Mapping Rev1/05

2 Electric Field Mapping Rev1/05 2 Electric Field Mapping Rev1/05 Theory: An electric field is a vector field that is produced by an electric charge. The source of the field may be a single charge or many charges. To visualize an electric

More information

Physics 22: Homework 4

Physics 22: Homework 4 Physics 22: Homework 4 The following exercises encompass problems dealing with capacitor circuits, resistance, current, and resistor circuits. 1. As in Figure 1, consider three identical capacitors each

More information

5. In parallel V 1 = V 2. Q 1 = C 1 V 1 and Q 2 = C 2 V 2 so Q 1 /Q 2 = C 1 /C 2 = 1.5 D

5. In parallel V 1 = V 2. Q 1 = C 1 V 1 and Q 2 = C 2 V 2 so Q 1 /Q 2 = C 1 /C 2 = 1.5 D NSWRS - P Physics Multiple hoice Practice ircuits Solution nswer 1. The resistances are as follows: I:, II: 4, III: 1, IV:. The total resistance of the 3 and 6 in parallel is making the total circuit resistance

More information

The equation which links current, potential difference and resistance is:

The equation which links current, potential difference and resistance is: An electrical circuit is shown in the figure below. The current in the circuit is direct current. What is meant by direct current? Tick one box. Current that continuously changes direction. Current that

More information

9. Which of the following is the correct relationship among power, current, and voltage?. a. P = I/V c. P = I x V b. V = P x I d.

9. Which of the following is the correct relationship among power, current, and voltage?. a. P = I/V c. P = I x V b. V = P x I d. Name: Electricity and Magnetism Test Multiple Choice Identify the choice that best completes the statement. 1. Resistance is measured in a unit called the. a. ohm c. ampere b. coulomb d. volt 2. The statement

More information

PHYS 1102 EXAM - II. SECTION: (Circle one) 001 (TH 9:30 AM to 10:45AM) 002 (TH 3:30 PM to 4:45 PM) You have 1 hr 45 minutes to complete the test

PHYS 1102 EXAM - II. SECTION: (Circle one) 001 (TH 9:30 AM to 10:45AM) 002 (TH 3:30 PM to 4:45 PM) You have 1 hr 45 minutes to complete the test PHYS 1102 EXAM - II SECTION: (Circle one) 001 (TH 9:30 AM to 10:45AM) 002 (TH 3:30 PM to 4:45 PM) Your Name: Student ID: You have 1 hr 45 minutes to complete the test PLEASE DO NOT START TILL YOU ARE INSTRUCTED

More information

NATIONAL QUALIFICATIONS CURRICULUM SUPPORT. Physics. Electricity. Questions and Solutions. James Page Arthur Baillie [HIGHER]

NATIONAL QUALIFICATIONS CURRICULUM SUPPORT. Physics. Electricity. Questions and Solutions. James Page Arthur Baillie [HIGHER] NTIONL QULIFICTIONS CURRICULUM SUPPORT Physics Electricity Questions and Solutions James Page rthur Baillie [HIGHER] The Scottish Qualifications uthority regularly reviews the arrangements for National

More information

2/25/2014. Circuits. Properties of a Current. Conservation of Current. Definition of a Current A. I A > I B > I C B. I B > I A C. I C D. I A E.

2/25/2014. Circuits. Properties of a Current. Conservation of Current. Definition of a Current A. I A > I B > I C B. I B > I A C. I C D. I A E. Circuits Topics: Current Conservation of current Batteries Resistance and resistivity Simple circuits 0.1 Electromotive Force and Current Conventional current is the hypothetical flow of positive charges

More information

Section 7 DOES ALL MATTER CONTAIN CHARGE? WHAT ARE ELECTRONS?

Section 7 DOES ALL MATTER CONTAIN CHARGE? WHAT ARE ELECTRONS? Section 7 DOES ALL MATTER CONTAIN CHARGE? WHAT ARE ELECTRONS? INTRODUCTION This section uses a new kind of bulb to resolve some basic questions: Do insulators contain charge? If so, is it ever mobile?

More information

Yr. 9 Electricity WorkBook

Yr. 9 Electricity WorkBook Yr. 9 Electricity WorkBook On completion of this booklet students should be able to: Recall the structure of a neutral atom: three particles, their charges, their location; Nucleus (Proton positive, Neutron-

More information

Lorik educational academy-vidyanagar

Lorik educational academy-vidyanagar Lorik educational academy-vidyanagar 9849180367 ----------------------------------------------------------------------------------------------------------------------- Section: Senior TOPIC: CURRENT ELECTRICITY

More information

PEP 2017 Assignment 12

PEP 2017 Assignment 12 of the filament?.16.. Aductile metal wire has resistance. What will be the resistance of this wire in terms of if it is stretched to three times its original length, assuming that the density and resistivity

More information

Can You Light the Bulb?

Can You Light the Bulb? AP PHYSCS 2 Can You Light the Bulb? UNT 4 DC circuits and RC circuits. CHAPTER 16 DC CRCUTS 1. Draw wires and make the bulb light. 2. Modify your drawing and use ONE wire only! Complete circuits To check

More information

Electric Field and Electric Potential

Electric Field and Electric Potential 1 Electric Field and Electric Potential 2 Prelab Write experiment title, your name and student number at top of the page. Prelab 1: Write the objective of this experiment. Prelab 2: Write the relevant

More information

LED s and R e sist or s

LED s and R e sist or s Provided by TryEngineering - L e s s o n F o c u s Expanding on understanding of simple circuits, this lesson explores LEDs and resistors and reviews the differences between parallel and series circuit

More information

Practice Final Exam (Answers keys)

Practice Final Exam (Answers keys) Speed (cm/s) Practice Final Exam (Answers keys) 1. A group of students arrange two level tracks side-by-side so they can have a race between two carts. They mount identical fan units (each with two real

More information

LABORATORY 4 ELECTRIC CIRCUITS I. Objectives

LABORATORY 4 ELECTRIC CIRCUITS I. Objectives LABORATORY 4 ELECTRIC CIRCUITS I Objectives to be able to discuss potential difference and current in a circuit in terms of electric field, work per unit charge and motion of charges to understand that

More information

Name: Block: Date: NNHS Introductory Physics: MCAS Review Packet #4 Introductory Physics, High School Learning Standards for a Full First-Year Course

Name: Block: Date: NNHS Introductory Physics: MCAS Review Packet #4 Introductory Physics, High School Learning Standards for a Full First-Year Course Introductory Physics, High School Learning Standards for a Full First-Year Course I. C ONTENT S TANDARDS electricity and magnetism. 5.1 Recognize that an electric charge tends to be static on insulators

More information

Electrical Circuits Question Paper 8

Electrical Circuits Question Paper 8 Electrical Circuits Question Paper 8 Level IGCSE Subject Physics Exam Board CIE Topic Electricity and Magnetism Sub-Topic Electrical Circuits Paper Type lternative to Practical Booklet Question Paper 8

More information

Ohm's Law 04/20/2006. Lecture 7 1

Ohm's Law 04/20/2006. Lecture 7 1 Review: What makes a bulb light up? On the rightness of ulbs Resistance lackbody Radiation Ohm s s Law The critical ingredient is closing a circuit so that current is forced through the bulb filament more

More information

Material World: Electricity

Material World: Electricity 17. Coulomb s Law The force, F, between two objects with charge q1 and q2, is given by: k q q 1 2 F -, where r = distance between the two charges in meters 2 r k = Coulomb's constant = 9 X 10 9 m 2 /C

More information

EXPERIMENT 12 OHM S LAW

EXPERIMENT 12 OHM S LAW EXPERIMENT 12 OHM S LAW INTRODUCTION: We will study electricity as a flow of electric charge, sometimes making analogies to the flow of water through a pipe. In order for electric charge to flow a complete

More information

7th Grade Task for today:

7th Grade Task for today: 7th Grade Task for today: Complete the Magnetism and Electricity task sheet. Be sure to complete both sides Use pages 654-677 for Magnetism Use pages 682-717 for Electricity 1. How do magnec poles interact?

More information

Agenda for Today. Elements of Physics II. Capacitors Parallel-plate. Charging of capacitors

Agenda for Today. Elements of Physics II. Capacitors Parallel-plate. Charging of capacitors Capacitors Parallel-plate Physics 132: Lecture e 7 Elements of Physics II Charging of capacitors Agenda for Today Combinations of capacitors Energy stored in a capacitor Dielectrics in capacitors Physics

More information

General Physics (PHYC 252) Exam 4

General Physics (PHYC 252) Exam 4 General Physics (PHYC 5) Exam 4 Multiple Choice (6 points). Circle the one best answer for each question. For Questions 1-3, consider a car battery with 1. V emf and internal resistance r of. Ω that is

More information

Physics Department. CfE Higher Unit 3: Electricity. Problem Booklet

Physics Department. CfE Higher Unit 3: Electricity. Problem Booklet Physics Department CfE Higher Unit 3: Electricity Problem Booklet Name Class 1 Contents Exercise 1: Monitoring and measuring a.c. Exercise 2: Current, voltage, power and resistance Exercise 3: Electrical

More information

Section 3 WHERE DOES THE MOVING CHARGE ORIGINATE?

Section 3 WHERE DOES THE MOVING CHARGE ORIGINATE? Section 3 WHEE DOES THE MOVING CHAGE OIGINATE? INTODUCTION Where does the charge that flows through a light bulb filament come from? Where was it located before it began to move? These questions will be

More information

1. A1, B3 2. A1, B2 3. A3, B2 4. A2, B2 5. A3, B3 6. A1, B1 7. A2, B1 8. A2, B3 9. A3, B1

1. A1, B3 2. A1, B2 3. A3, B2 4. A2, B2 5. A3, B3 6. A1, B1 7. A2, B1 8. A2, B3 9. A3, B1 peden (jp5559) Time onstants peden (0100) 1 This print-out should have 21 questions. Multiple-choice questions may continue on the next column or page find all choices before answering. Test is Thursday!

More information

Chapter 19. Electric Current, Resistance, and DC Circuit Analysis

Chapter 19. Electric Current, Resistance, and DC Circuit Analysis Chapter 19 Electric Current, Resistance, and DC Circuit Analysis I = dq/dt Current is charge per time SI Units: Coulombs/Second = Amps Direction of Electron Flow _ + Direction of Conventional Current:

More information