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


 Darrell Flynn
 2 years ago
 Views:
Transcription
1 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
2 Clicker Question 1: The lightbulbs in the circuits below are identical with the same resistance R.. Which circuit produces more light? (brightness power) a) circuit I b) circuit II c) both the same d) it depends on R Physics 201: Lecture 1, Pg 2
3 Clicker Question 1: Physics 201: Lecture 1, Pg 3
4 Clicker Question 2: What happens to the voltage across the resistor R 4 when the switch is closed? a) increases b) decreases c) stays the same R 1 S V R 3 R 4 R 2 Physics 201: Lecture 1, Pg 4
5 Clicker Question 3: Which resistor has the greatest current going through it? Assume that all the resistors are equal. a) R 1 V b) both R 1 and R 2 equally c) R 3 and R 4 d) R 5 e) all the same Physics 201: Lecture 1, Pg 5
6 Clicker Question 3: V Physics 201: Lecture 1, Pg 6
7 Problem In the circuit shown below, rank in order, from most to least bright, the brightness of bulbs A E. Physics 201: Lecture 1, Pg 7
8 Clicker Question 4: Bulbs A and B in the figure are identical, and both are glowing. Bulb B is removed from its socket. (a) Does the potential difference Delta V 12 between points 1 and 2 increase, stay the same, decrease, or become zero? (a) (b) (c) (d) increase stay the same decrease become zero Physics 201: Lecture 1, Pg 8
9 Kirchhoff s Junction Law For a junction, the law of conservation of current requires that: where the symbol means summation. This basic conservation statement is called Kirchhoff s junction law. Physics 201: Lecture 1, Pg 9
10 Kirchhoff s Loop Law For any path that starts and ends at the same point: The sum of all the potential differences encountered while moving around a loop or closed path is zero. This statement is known as Kirchhoff s loop law. Physics 201: Lecture 1, Pg 10
11 Steps for Using Kirchhoffs Rules Label all currents Label +/ for all elements Emf (regular +/) Resistors current goes from + to  Choose a loop and direction (your choice) Wit Write down voltage drops across resistors Loop rule (use first sign you get to) List voltages Write down current equation Junction rule Physics 201: Lecture 1, Pg 11
12 Loop Rule Physics 201: Lecture 1, Pg 12
13 Example Solve for the currents in all parts of the circuit. Anytime there is a junction current must split!!! +  I 1 is not necessarily through resistor R R 1 = 10 1!!! + A  Current can only I change at a junction!!! 2 I R 2 = Current in a segment w/o a junction must I I I + remain constant! I 1 2 = 5 V = 10 V B Physics 201: Lecture 1, Pg 13
14 Three loops Example I 1 = I 2 + I 3 Bottom loop clockwise from A I 2 (R 1 ) = 0 (1) + I R 2 = 10 3 R 1 = 10 Top loop clockwise from A + A  I 3 (R 2 )  2 I 2 (R 1 )= 0 (2) I 22 = 5 V +  B Outside loop clockwise from A I 1 I (R )  = 0 (3) + I 3 (R 2 )  1 = 0 (3)  1 = 10 V Physics 201: Lecture 1, Pg 14
15 I 2 (R 1 ) = 0 (1) I 3 (R 2 )  2 I 2 (R 1 )= 0 (2) Example I 3 = 1 A I 2 =.5 A 2 I 1 = 1 A +.5 A = 1.5 A I 3 (R 2 )  1 = 0 (3) I R 2 = I = I + I (4)  A R 1 = I 2 2 = 5 V +  B I = 10 V Physics 201: Lecture 1, Pg 15
16 Clicker Question 5: A circuit is built out of resistors and two batteries as shown in the below. According to Kirchhoff's Current Rule: (a) I 1 +I 2 = I 3 (b) I 2 +I 3 = I 1 (c) I 1 I 3 = I 2 (d) I 1 +I 2 = I 3 (e) I 1 +I 3 = I 2 Physics 201: Lecture 1, Pg 16
17 Clicker Question 6: A circuit is built out of resistors and two batteries as shown in the below. According to Kirchhoff's Loop Rule the left loop tells us: (a) 12 V  (3 )I 1 +(6 )1 2 = 0 (b)  12 V  (3 )I 1 +(6 )1 2 = 0 (c) 12 V  (3 )I 1  (6 )1 3 = 0 (d) 12 V  (3 )I 1  (6 )1 1 = 0 (e) 12 V  (3 )I 1  (6 )1 2 = Physics 201: Lecture 1, Pg 17
18 Clicker Question 7: A circuit is built out of resistors and two batteries as shown in the below. According to Kirchhoff's Loop Rule the right loop tells us: (a) 12 V  (3 )I 1 +(6 )1 2 = 0 (b)  12 V  (3 )I 1 +(6 )1 2 = 0 (c) 12 V  (4 )I 2  (6 )1 3 = 0 (d) 12 V  (4 )I 2 + (6 )1 3 = 0 (e)  12 V + (4 )I 2 + (6 )1 3 = Physics 201: Lecture 1, Pg 18
19 Clicker Question 8: A circuit is built out of resistors and two batteries as shown in the below. According to Kirchhoff's Loop Rule the outside loop tells us: (a) 24 V  (3 )I 1  (4 )1 3 = 0 (b) 24 V  (3 )I 1 + (4 )1 3 = 0 (c)  (3 )I 1 + (4 )1 2 = 0 (d)  (3 )I 1  (4 )1 3 = 0 (e) 24 V  (3 )I 1 + (4 )1 3 = Physics 201: Lecture 1, Pg 19
20 Clicker Question 9: A circuit is built out of resistors and two batteries as shown in the below. Find the current I 3. (a) 4.01 A (b) 2.87 A (c) 1.76A (d) 156A 1.56 (e) 0.93 A Physics 201: Lecture 1, Pg 20
21 Clicker Question 9: A circuit is built out of resistors and two batteries as shown in the below V + (4 )I 2 + (6 )1 3 = 0  (3 )I 1 + (4 )1 2 = 0 12 V  (3 )I 1  (6 )1 3 = 0 I 1 +I 2 = I 3 Physics 201: Lecture 1, Pg 21
22 Clicker Question 10: The ammeter reads 3 A. What is I 1? (a) (b) (c) (d) (e) 3 A 2 A 1 A 2.5 A 1.5 A Physics 201: Lecture 1, Pg 22
23 Clicker Question 10: The ammeter reads 3 A. What is I 1? Physics 201: Lecture 1, Pg 23
24 Example: In the following figure, what is the value of the potential at points a and b? Physics 201: Lecture 1, Pg 24
25 Clicker Question 11: Determine the current going through the 12 resistor: (a) 0.7 A (b) 0.9 A (c) 1.2 A A R 1 =12 1 = 6 V (d) 1.5 A (e) 2.0 A 2 = 24 V R 2 =8 Physics 201: Lecture 1, Pg 25
26 Clicker Question 12: The lightbulbs in the circuit are identical. When the switch is closed, what happens? a) both bulbs go out b) intensity of both bulbs increases c) intensity it of both bulbs decreases d) A gets brighter and B gets dimmer e) nothing changes Physics 201: Lecture 1, Pg 26
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 informationPower lines. Why do birds sitting on a highvoltage 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 informationConcepTest 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 informationphysics 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 informationConcepTest 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 informationParallel 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 informationParallel 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 informationPhysics 1402: Lecture 10 Today s Agenda
Physics 1402: Lecture 10 Today s Agenda Announcements: Lectures posted on: www.phys.uconn.edu/~rcote/ HW assignments, solutions etc. Homework #3: On Masterphysics : due Friday at 8:00 AM Go to masteringphysics.com
More informationCircuits. 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 informationElectricity & Magnetism
Electricity & Magnetism D.C. Circuits Marline Kurishingal Note : This chapter includes only D.C. In AS syllabus A.C is not included. Recap... Electrical Circuit Symbols : Draw and interpret circuit diagrams
More informationLecture 11. Power in Electric Circuits, Kirchhoff s Rules
Lecture 11. Power in Electric Circuits, Kirchhoff s Rules Outline: Energy and power in electric circuits. Voltage and Current Sources. Kirchhoff s Rules. Lecture 10: Connection of resistors in parallel
More information10/14/2018. Current. Current. QuickCheck 30.3
Current If QCurrent is the total amount of charge that has moved past a point in a wire, we define the current I in the wire to be the rate of charge flow: The SI unit for current is the coulomb per second,
More informationPhysics 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 information52 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 informationPhysics 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 informationIntroduction. Prelab 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 information1) 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 informationΔV of battery. = ε  Ir or εmf = I(R+r) (for this particular series circuit) March 04, Emf and internal resistance. Emf and internal resistance
Emf and internal resistance Emf and internal resistance ΔV of battery = ε  Ir or εmf = I(R+r) (for this particular series circuit) As the current in the circuit increases the voltage, supplied to the
More informationSierzega: 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 informationCurrent. I = ei e = en e Av d. The current, which is Coulomb s per second, is simply
Current The current, which is Coulomb s per second, is simply I = ei e = en e Av d e is the charge is the electron! ne is the density of electrons! A is the cross sectional area of the wire! vd is the
More informationLecture 12 Chapter 28 RC Circuits Course website:
Lecture 12 Chapter 28 RC Circuits Course website: http://faculty.uml.edu/andriy_danylov/teaching/physicsii Today we are going to discuss: Chapter 28: Section 28.9 RC circuits Steady current Timevarying
More informationMasteringPhysics: 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 15cmlong nichrome wire is
More informationConcepTest 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 informationChapter 6 DIRECT CURRENT CIRCUITS. Recommended Problems: 6,9,11,13,14,15,16,19,20,21,24,25,26,28,29,30,31,33,37,68,71.
Chapter 6 DRECT CURRENT CRCUTS Recommended Problems: 6,9,,3,4,5,6,9,0,,4,5,6,8,9,30,3,33,37,68,7. RESSTORS N SERES AND N PARALLEL  N SERES When two resistors are connected together as shown we said that
More informationPHYS 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 informationweek 6 chapter 31 Current and Resistance
week 6 chapter 31 Current and Resistance Which is the correct way to light the lightbulb with the battery? 4) all are correct 5) none are correct 1) 2) 3) Which is the correct way to light the lightbulb
More informationDirect Current Circuits. February 18, 2014 Physics for Scientists & Engineers 2, Chapter 26 1
Direct Current Circuits February 18, 2014 Physics for Scientists & Engineers 2, Chapter 26 1 Kirchhoff s Junction Rule! The sum of the currents entering a junction must equal the sum of the currents leaving
More informationPhysics 1302W.400 Lecture 21 Introductory Physics for Scientists and Engineering II
Physics 1302W.400 Lecture 21 Introductory Physics for Scientists and Engineering II In today s lecture, we will learn to: Calculate the resistance of a conductor depending on the material and shape Apply
More informationR R V I R. Conventional Current. Ohms Law V = IR
DC Circuits opics EMF and erminal oltage esistors in Series and in Parallel Kirchhoff s ules EMFs in Series and in Parallel Capacitors in Series and in Parallel Ammeters and oltmeters Conventional Current
More informationBrian 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 informationPHYSICS 171. Experiment 3. Kirchhoff's Laws. Three resistors (Nominally: 1 Kilohm, 2 Kilohm, 3 Kilohm).
PHYSICS 171 Experiment 3 Kirchhoff's Laws Equipment: Supplies: Digital Multimeter, Power Supply (020 V.). Three resistors (Nominally: 1 Kilohm, 2 Kilohm, 3 Kilohm). A. Kirchhoff's Loop Law Suppose that
More information1. 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 printout should have 21 questions. Multiplechoice questions may continue on the next column or page find all choices before answering. Test is Thursday!
More informationCircuits. 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 informationTactics 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 information5. 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 informationGr. 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 informationRC Circuits. Lecture 13. Chapter 31. Physics II. Course website:
Lecture 13 Chapter 31 Physics II RC Circuits Course website: http://faculty.uml.edu/andriy_danylov/teaching/physicsii Lecture Capture: http://echo360.uml.edu/danylov201415/physics2spring.html Steady current
More informationPhysics 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 20122013 Series
More informationChapter 26 Examples : DC Circuits Key concepts:
Chapter 26 Examples : DC Circuits Key concepts: Internal resistance : battery consists of some idealized source of voltage (called the electromotive force, or EMF, which uses the symbol ξ) and an effective
More informationCircuit 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 informationLab 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 informationPhysics 202: Lecture 5, Pg 1
Resistance Resistors Series Parallel Ohm s law Electric Circuits Current Physics 132: Lecture e 15 Elements of Physics II Kirchhoff s laws Agenda for Today Physics 202: Lecture 5, Pg 1 Electric Current
More informationLABORATORY 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 informationPHYS 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 informationName 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 informationChapter 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 informationA 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: Rightclick on
More informationCircuits Practice Websheet 18.1
Circuits Practice Websheet 18.1 Multiple Choice Identify the choice that best completes the statement or answers the question. 1. How much power is being dissipated by one of the 10Ω resistors? a. 24
More informationPhysics 102: Lecture 06 Kirchhoff s Laws
Physics 102: Lecture 06 Kirchhoff s Laws Physics 102: Lecture 6, Slide 1 Today Last Lecture Last Time Resistors in series: R eq = R 1 R 2 R 3 Current through each is same; Voltage drop is IR i Resistors
More informationChapter 28. Direct Current Circuits
Chapter 28 Direct Current Circuits Electromotive Force An electromotive force device, or emf device, is a source of constant potential. The emf describes the work done per unit charge and has units of
More informationT U T O R I A L : A M O D E L F O R C I R C U I T S
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
More informationActivity 4: The ElectricCircuit Interaction
RECORD SHEET Activity 4: The ElectricCircuit Interaction Name Date Class Key Questions 1. 2. Explore Your Ideas Experiment 1: When does an electriccircuit interaction occur? 1. Draw a picture of the
More informationElectrodynamics. Review 8
Unit 8 eview: Electrodynamics eview 8 Electrodynamics 1. A 9.0 V battery is connected to a lightbulb which has a current of 0.5 A flowing through it. a. How much power is delivered to the b. How much energy
More informationLab 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 informationPhysics 115. General Physics II. Session 24 Circuits Series and parallel R Meters Kirchoff s Rules
Physics 115 General Physics II Session 24 Circuits Series and parallel R Meters Kirchoff s Rules R. J. Wilkes Email: phy115a@u.washington.edu Home page: http://courses.washington.edu/phy115a/ 5/15/14 Phys
More informationPhysics 212. Lecture 11. RC Circuits. Change in schedule Exam 2 will be on Thursday, July 12 from 8 9:30 AM. Physics 212 Lecture 11, Slide 1
Physics 212 Lecture 11 ircuits hange in schedule Exam 2 will be on Thursday, July 12 from 8 9:30 AM. Physics 212 Lecture 11, Slide 1 ircuit harging apacitor uncharged, switch is moved to position a Kirchoff
More informationName 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 informationExam 3PHYS 102S14
Name: Exam 3PHYS 102S14 Multiple Choice Identify the choice that best completes the statement or answers the question. 1. Which of these statements is always true? a. resistors in parallel have the
More informationLecture 7.1 : Current and Resistance
Lecture 7.1 : Current and Resistance Lecture Outline: Current and Current Density Conductivity and Resistivity Resistance and Ohm s Law Textbook Reading: Ch. 30.330.5 Feb. 26, 2013 1 Announcements By
More informationCopyright 2008 Pearson Education, Inc., publishing as Pearson AddisonWesley.
Lights, sound systems, microwave ovens, and computers are all connected by wires to a battery or an electrical outlet. How and why does electric current flow through a wire? Chapter Goal: To learn how
More informationChapter 24: Electric Current
Chapter 24: Electric Current Electric current Electric current is a net flow of electric charge. Quantitatively, current is the rate at which charge crosses a given area. I = dq dt dq = q(n AL)=q(n Av
More informationAgenda for Today. Elements of Physics II. Capacitors Parallelplate. Charging of capacitors
Capacitors Parallelplate 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 information1. 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, crosssectional area and length. 2. Relate the movement of charge to differences
More informationPRACTICE EXAM 1 for Midterm 2
PRACTICE EXAM 1 for Midterm 2 Multiple Choice Questions 1) The figure shows three identical lightbulbs connected to a battery having a constant voltage across its terminals. What happens to the brightness
More informationPhysics for Scientists & Engineers 2
Review The resistance R of a device is given by Physics for Scientists & Engineers 2 Spring Semester 2005 Lecture 8 R =! L A ρ is resistivity of the material from which the device is constructed L is the
More informationKirchhoff s Rules. Kirchhoff s rules are statements used to solve for currents and voltages in complicated circuits. The rules are
Kirchhoff s Rules Kirchhoff s rules are statements used to solve for currents and voltages in complicated circuits. The rules are Rule. Sum of currents into any junction is zero. i = 0 i 1 2 = 12 Why?
More informationChapter 25: Electric Current
Chapter 25: Electric Current Conductors and Charge Carriers Consider a conducting piece of metal: The valence electrons are weakly bound to the nuclei form a fluidlike sea of electrons that can move through
More informationPhysics 6B Summer 2007 Final
Physics 6B Summer 2007 Final Question 1 An electron passes through two rectangular regions that contain uniform magnetic fields, B 1 and B 2. The field B 1 is stronger than the field B 2. Each field fills
More informationElectricity & Magnetism Lecture 10: Kirchhoff s Rules
Electricity & Magnetism Lecture 10: Kirchhoff s Rules Today s Concept: Kirchhoff s Rules Electricity & Magne
More informationUse these circuit diagrams to answer question 1. A B C
II Circuit Basics Use these circuit diagrams to answer question 1. B C 1a. One of the four voltmeters will read 0. Put a checkmark beside it. b. One of the ammeters is improperly connected. Put a checkmark
More informationAP Physics C. Electric Circuits III.C
AP Physics C Electric Circuits III.C III.C.1 Current, Resistance and Power The direction of conventional current Suppose the crosssectional area of the conductor changes. If a conductor has no current,
More informationNORTHERN 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 informationChapter 21 Electric Current and Direct Current Circuits
Chapter 21 Electric Current and Direct Current Circuits Units of Chapter 21 Electric Current Resistance and Ohm s Law Energy and Power in Electric Circuits Resistors in Series and Parallel Kirchhoff s
More informationDirectCurrent Circuits. Physics 231 Lecture 61
DirectCurrent Circuits Physics 231 Lecture 61 esistors in Series and Parallel As with capacitors, resistors are often in series and parallel configurations in circuits Series Parallel The question then
More informationChapter 30 Self Inductance, Inductors & DC Circuits Revisited
Chapter 30 Self Inductance, Inductors & DC Circuits Revisited SelfInductance and Inductors Self inductance determines the magnetic flux in a circuit due to the circuit s own current. B = LI Every circuit
More informationName: Block: Date: NNHS Introductory Physics: MCAS Review Packet #4 Introductory Physics, High School Learning Standards for a Full FirstYear Course
Introductory Physics, High School Learning Standards for a Full FirstYear Course I. C ONTENT S TANDARDS electricity and magnetism. 5.1 Recognize that an electric charge tends to be static on insulators
More informationLecture Outline Chapter 21. Physics, 4 th Edition James S. Walker. Copyright 2010 Pearson Education, Inc.
Lecture Outline Chapter 21 Physics, 4 th Edition James S. Walker Chapter 21 Electric Current and Direct Current Circuits Units of Chapter 21 Electric Current Resistance and Ohm s Law Energy and Power
More informationM. C. Escher: Waterfall. 18/9/2015 [tsl425 1/29]
M. C. Escher: Waterfall 18/9/2015 [tsl425 1/29] Direct Current Circuit Consider a wire with resistance R = ρl/a connected to a battery. Resistor rule: In the direction of I across a resistor with resistance
More informationReview of Circuit Analysis
Review of Circuit Analysis Fundamental elements Wire Resistor Voltage Source Current Source Kirchhoff s Voltage and Current Laws Resistors in Series Voltage Division EE 42 Lecture 2 1 Voltage and Current
More informationAC vs. DC Circuits. Constant voltage circuits. The voltage from an outlet is alternating voltage
Circuits AC vs. DC Circuits Constant voltage circuits Typically referred to as direct current or DC Computers, logic circuits, and battery operated devices are examples of DC circuits The voltage from
More informationP202 Practice Exam 2 Spring 2004 Instructor: Prof. Sinova
P202 Practice Exam 2 Spring 2004 Instructor: Prof. Sinova Name: Date: (5)1. How many electrons flow through a battery that delivers a current of 3.0 A for 12 s? A) 4 B) 36 C) 4.8 10 15 D) 6.4 10 18 E)
More informationDe La Salle University Manila Physics Fundamentals for Engineering 2 Quiz No. 3 Reviewer
De La Salle University Manila Physics Fundamentals for Engineering 2 Quiz No. 3 Reviewer Multiple Choice: 1. Which of the two arrangements shown has the smaller equivalent resistance between points a and
More informationPHY232 Spring 2008 Jon Pumplin (Original ppt courtesy of Remco Zegers) Direct current Circuits
PHY232 Spring 2008 Jon Pumplin http://www.pa.msu.edu/~pumplin/phy232 (Original ppt courtesy of Remco Zegers) Direct current Circuits So far, we have looked at systems with only one resistor PHY232 Spring
More informationElectric Circuits Part 2: Kirchhoff s Rules
Electric Circuits Part 2: Kirchhoff s Rules Last modified: 31/07/2018 Contents Links Complex Circuits Applying Kirchhoff s Rules Example Circuit Labelling the currents Kirchhoff s First Rule Meaning Kirchhoff
More informationPOWER B. Terms: EMF, terminal voltage, internal resistance, load resistance. How to add up resistors in series and parallel: light bulb problems.
iclicker Quiz (1) I have completed at least 50% of the reading and studyguide assignments associated with the lecture, as indicated on the course schedule. A. True B. False Hint: this is a good time to
More informationIn this unit, we will examine the movement of electrons, which we call CURRENT ELECTRICITY.
Recall: Chemistry and the Atom! What are the 3 subatomic Where are they found in the particles? atom? What electric charges do they have? How was a positive ion created? How was a negative ion created?
More informationCurrent 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 informationPhysics 1502: Lecture 9 Today s Agenda
Physics 1502: Lecture 9 Today s Agenda Announcements: Lectures posted on: www.phys.uconn.edu/~rcote/ HW assignments, solutions etc. Homework #3: On Masterphysics : due Friday at 8:00 AM Go to masteringphysics.com
More informationAgenda for Today. Elements of Physics II. Capacitors Parallelplate. Charging of capacitors
Capacitors Parallelplate 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 informationElectric Current & DC Circuits
Electric Current & DC Circuits Circuits Click on the topic to go to that section Conductors Resistivity and Resistance Circuit Diagrams Measurement EMF & Terminal Voltage Kirchhoff's Rules Capacitors*
More informationReview. Multiple Choice Identify the letter of the choice that best completes the statement or answers the question.
Review Multiple Choice Identify the letter of the choice that best completes the statement or answers the question. 1. When more devices are added to a series circuit, the total circuit resistance: a.
More informationCourse Updates.
Course Updates http://www.phys.hawaii.edu/~varner/phys272spr10/physics272.html Notes for today: 1) Chapter 26 this week (DC, C circuits) 2) Assignment 6 (Mastering Physics) online and separate, written
More informationChapter 28. Direct Current Circuits
Chapter 28 Direct Current Circuits Circuit Analysis Simple electric circuits may contain batteries, resistors, and capacitors in various combinations. For some circuits, analysis may consist of combining
More informationPHYS 1444 Section 003 Lecture #12
PHYS 1444 Section 003 Lecture #12 Monday, Oct. 10, 2005 EMF and Terminal Voltage Resisters in series and parallel Kirchhoff s Rules EMFs in series and parallel RC Circuits Today s homework is homework
More informationElectricity & Magnetism Lecture 10: Kirchhoff s Rules
Electricity & Magnetism Lecture 10: Kirchhoff s Rules Today s Concept: Kirchhoff s Rules Electricity & Magne/sm Lecture 10, Slide 1 Deadline for Unit 23 Ac>vity guide and WriBen Homework is pushed to Friday
More informationCURRENT SOURCES EXAMPLE 1 Find the source voltage Vs and the current I1 for the circuit shown below SOURCE CONVERSIONS
CURRENT SOURCES EXAMPLE 1 Find the source voltage Vs and the current I1 for the circuit shown below EXAMPLE 2 Find the source voltage Vs and the current I1 for the circuit shown below SOURCE CONVERSIONS
More informationChapter 18 Electric Currents
Chapter 18 Electric Currents 1 The Electric Battery Volta discovered that electricity could be created if dissimilar metals were connected by a conductive solution called an electrolyte. This is a simple
More informationResistance, Ohm s Law and Kirchoff s Laws
Universiti Teknologi MR Fakulti Sains Gunaan Resistance, Ohm s Law and Kirchoff s Laws PHY631: Physical Science ctivity Name: HP: Lab#: Intro Objectives The goal of today s activity is to physically investigate
More informationPreliminary Course Physics Module 8.3 Electrical Energy in the Home Summative Test. Student Name:
Summative Test Student Name: Date: / / IMPORTANT FORMULAE I = Q/t V = I.R R S = R 1 + R 2 +.. 1/R P = 1/R 1 + 1/R 2 + P = V.I = I 2.R = V 2 /R Energy = V.I.t E = F/q Part A. Multiple Choice Questions 120.
More informationPhysics 9 Wednesday, November 28, 2018
Physics 9 Wednesday, November 28, 2018 HW10 due Friday. For today, you read Mazur ch31 (electric circuits) The main goals for the electricity segment (the last segment of the course) are for you to feel
More information