SOTM LAB: P16 OHM S LAW I. TEACHER NOTES & GUIDELINES TITLE OF LAB: Ohm s Law DEVELOPERS OF LAB:
|
|
- Audra Logan
- 5 years ago
- Views:
Transcription
1 SOTM LAB: P16 OHM S LAW I. TEACHER NOTES & GUIDELINES TITLE OF LAB: Ohm s Law DEVELOPERS OF LAB: John Lane, JD853@maristb.marist.edu Taylor Pancoast, JD573@maristb.marist.edu OVERVIEW OF LAB DESCRIPTION The lab investigates the relationship between voltage and current to demonstrate Ohm s Law for resistive elements. The lab builds on naïve conceptions of current flow (movement of charges), voltage (force pushing the charges) and resistance ( frictional opposition to the current.) In the pre-lab students will use a simple light bulb circuit to investigate the conducting properties of some common substances. They will then be asked to describe what they have observed and suggest explanations. The students will then be shown how to use a lap top computer interfaced with voltage and current sensors to monitor voltage, current and (by calculation) resistance. Finally the students will be asked to plan and carry out an investigation of the relationship between current, voltage and resistance using the demonstrated technology. CURRICULUM CONSIDERATIONS This lab is intended to be an introduction to voltage, resistance, current and Ohm s Law. It assumes that students have studied static electricity, know what a simple circuit is and have some concept of current. If the students are not familiar with circuits, an exercise such as connecting a bulb, battery and wire to light the bulb could be completed to introduce circuits. Setting up the circuit for testing conductivity can also be used as an exercise to review how to connect a circuit. SAFETY CONSIDERATIONS Although the voltages and currents used are small, care must be taken to instill in students proper respect for the hazards of electrical shock along with safe handling habits. Students should also be cautioned about the fragility of computer and electrical equipment.
2 BACKGROUND INFORMATION A. SCIENTIFIC VIEWPOINT The underlying concept is Ohm s Law, V = IR, where R is the slope of the V vs I curve. Devices which obey Ohm s Law are called ohmic; those which don t obey Ohm s Law are called non-ohmic. B. COMMON MISCONCEPTION 1. Objects are either perfect conductors or perfect insulators. (There is a continuum of conductivity.) 2. The battery provides all the electrons flowing in the circuit. (All matter provides electrons; the battery provides the voltage to move them.) 3. Protons flow in a circuit, not electrons. (Electrons flow.) 4. All objects/devices are ohmic. (Some things are ohmic, some are not.) OBJECTIVES After completing the lab the student should be able to: 1. State the relationship between the variables V, I and R (Ohm s Law.) 2. Use Ohm s Law to predict a missing variable 3. Give an example of an ohmic and a non-ohmic device/object. 4. Find R from data on V vs. I (usually a graph.) EQUIPMENT/MATERIALS PROVIDED BY SOTM Laptop computer with Science Workshop installed Science Workshop 750 Interface including Patch Cord for analog A channel (voltage) Patch Cord for analog B channel (current) constructed using a 1 ohm resistor, voltage patch cord and two banana plugs (2) Patch cords with banana plugs for voltage output AC/DC Electronics Laboratory PASCO EM-8656 including (2) D batteries light bulb (3 volt) (3) wire leads resistors,(eg.1000 ohm, 100 ohm, etc.) dual LED, LED PROVIDED LOCALLY Various objects to test conductivity including metal such as coins, aluminum foil nonmetal such as paper, plastic graphite pencil with both ends exposed
3 ADVANCE PREPARATION PRE-LAB To set up the conductivity test circuit, use the Electronics Laboratory patch board with two batteries and a bulb in series with the two 10-inch wire leads as in Figure 1. Use the leads to test various objects. The circuit for testing conductivity should be set up beforehand (or setting up can be used as an exercise to review how to connect a circuit.) If desired an exercise such as connecting a bulb, battery and wire to light the bulb could be completed to introduce circuits. (Note: metal objects should cause full brightness, nonmetal should cause no light, and the pencil should cause a dim light) Figure 1 Pre-lab Patch Board Setup
4 EXPLORATION Have the materials available to set up the circuit as shown in Figure 2 to measure voltage and current for a 1000-ohm resistor. Make sure the experiment file, OHMSLAW.SWS, is on all computers. FIGURE 2. Exploration and Elaboration Patch Board Setup ELABORATION Have non-ohmic objects available for student elaboration using the measurement procedure from the EXPLORATION. PROCEDURE HOW TO USE OHMSLAW.SWS PART I: Computer Setup 1. Connect the Science Workshop interface to the computer, turn on the 750 interface, and turn on the computer. 2. Plug a voltage Patch Cord into Analog Channel A and a Patch Cord modified for current into Analog Channel B. Plug banana plugs into the Output sockets. Connect the other ends of each of these to the PASCO patchboard in accordance with Figure Open the document titled OHMSLAW.SWS The document opens with windows labeled OHM, GRAPH DISPLAY, TABLE, SIGNAL GENERATOR, VOLTAGE AND CURRENT.
5 4. The Sampling Option is set on keyboard and will collect data at a rate of once per second. 5. The Signal Generator is set to DC (direct current) and zero volts. It will turn on automatically when you collect data. Part II: Data Recording 1. In the OHM window click the MON button to begin monitoring data (display data without recording it permanently). This calls up the KEYBOARD SAMPLING window which will enable you to see data points one at a time. To see a data point (v & I), first set the voltage as desired (see #2 below) and then hit ENTER. Ignore the numbers inside the sampling box. Your data will appear in the TABLE screen and in the VOLTAGE and CURRENT display screens. To see the next data point reset the voltage and again hit ENTER. To stop seeing data click on the STOP COLLECTING button. 2. The voltage can be regulated by clicking on the signal generator and then either clicking on the up and down arrows to change the voltage by 1.0 volt increments or by clicking on the displayed voltage and typing in the new voltage desired. 3. In the OHM window click the REC button to begin recording data. This calls up the KEYBOARD SAMPLING window which will enable you to record data points one at a time. To record a data point (v & I), first set the voltage as desired (see#2 above) and then hit ENTER. Ignore the numbers inside the sampling box. Your data will appear in the TABLE screen and in the VOLTAGE and CURRENT display screens. To record the next data point reset the voltage and again hit ENTER. To stop collecting data click on the STOP COLLECTING button. Part III: Data Analysis 1. On the GRAPH DISPLAY click on the statistics symbol (Σ), a window will open, click on the new statistics symbol, then choose CURVE FIT and then LINEAR FIT.
6 II. PRE-LAB PRE-LAB EXERCISE TO ELICIT STUDENTS PRIOR KNOWLEDGE AND MISCONCEPTIONS Have the students fill out the pre-lab questionnaire. Small groups of students will be presented with an open light bulb circuit (see Figure 1) consisting of two 1.5 volt batteries in series (3 volt source), a 3 volt light bulb, and two probes that can be used to close the circuit about various objects to be tested. (At the instructor s discretion the students may be asked to construct the circuit.) The students will be given a variety of materials (tin foil, pencil lead, metal objects, wooden objects, etc.) to test for conductivity by including them in the circuit. Students should record their observations (how bright the light bulb is) for the conductivity of the various objects and then propose and record explanations of their observations. The student handout will contain the following suggested questions: 1. How do results for various objects differ (if they do?) 2. Are there different types of objects? 3. Can you devise a scheme for predicting results for new objects? 4. Can you suggest any explanations of generalizations for how electricity flows? 5. What is the function of the battery? 6. How could you test your ideas? 7. If you wanted to measure the flow of electricity what aspects of the flow might you measure? DISCUSSION OF PRECONCEPTIONS The class as a whole can compare observations for the various objects. Note that some objects are intermediate in conductivity. The instructor can summarize results on the board. Each group can then share with the class their explanations for what was observed. The teacher should point out what the explanations have in common and how they are different. Students can be asked to suggest ways to test their explanations. As students consider ways to test explanations, they may become more aware of the implications of those explanations, which may lead to revisions prior to testing. The need for ways to talk about and measure quantities such as current, voltage and resistance may become apparent. (The instructor should refrain from using the terms current, voltage and resistance during the pre lab exercise.)
7 PRE-LAB QUESTIONAIRE Pre-lab Questionnaire (with possible public scientific knowledge responses) 1. What is electricity? (flow of charges through a conductor) 2. What happens when an object conducts electricity? (electrons (usually) travel through the object) 3. Give an example of an object that conducts electricity. (penny) 4. What kinds of objects conduct electricity? (metallic) 5. Give an example of an object that does not conduct electricity.(paper) 6. What kinds of objects do not conduct electricity? (non-metallic) 7. What is an electrical circuit? (closed loop in which a charges flows) 8. What is required for a circuit to conduct electricity? (a force on the charges and a path for them to flow through) 9. How do you measure the amount of electricity conducted? (current in terms of # of charges passing a point in a circuit per unit time) 10. What controls how much electricity an object conducts? (the force on the charges measured by the potential difference between points in the circuit in volts, and the resistance of the object measured in ohms) 11. Please list and define any terms you would use to discuss electricity.
8 III. EXPLORATION OF SCIENTIFIC PRINCIPLE & INTRODUCTION OF EXPERIMENTAL PROTOCOL PROBLEM The instructor should now introduce the terms current (movement of charges), voltage (force pushing the current) and resistance ( frictional opposition to the current), if they have not already been used by the students. These terms may need clarification even if the students have been using them. The initial problem is: How can we quantitatively measure current, voltage and resistance? EXPERIMENT AND TECHNICAL OPERATION OF EQUIPMENT Set up the Electronics Laboratory patch board as shown in Figure 2. Load OHMSLAW.SWS from the hard disk. PROVIDED BY SOTM Laptop computer with Science Workshop installed Science Workshop 750 Interface including Patch Cord for analog A channel (voltage) Patch Cord for analog B channel (current) constructed using 1 ohm resistor, voltage patch cord and two banana plugs (2) Patch cords with banana plugs for voltage output AC/DC Electronics Laboratory PASCO EM-8656 including wire lead, 3 inch various resistors, 1000 ohm, 500 ohm, etc The teacher will demonstrate the measurement of one voltage-current point for the 1000 ohm resistor. Ask the students the following: 1. What will happen to the current if you increase the voltage? 2. What will happen to the current if you decrease the voltage? 3. What happens if you change the sign of the voltage? 4. What is the shape of the curve? 5. How does the slope of the curve compare at different currents? 6. What happens in the circuit when the slope increases? Decreases? (Note: Usually we define the independent variable as the one we are varying and look for the response of the dependent variable. The data is then graphed with the independent variable on the x-axis. Due to the definition of resistance, we plot V on the y-axis and I on the x-axis, so that the slope is R. The interface, however, cannot easily vary current, so we change the voltage and measure the current as the response. The graphs are set up to look at voltage versus current.) The expected product for this part of the lab is to recognize that V vs. I is linear and the slope, R, is a property of the object being measured. Different groups should be given different values of resistor and the results compared to determine what R means. If a group completes the curve for a single resistor they could work on a second resistor in order to answer question.
9 IV. ELABORATION OF SCIENTIFIC PRINCIPLE: INQUIRY-BASED STUDENT INVESTIGATION PROBLEM The instructor should now ask each student group to write down at least two questions about electrical current flow. They should write down ways to investigate answers to the questions using the equipment provided. The students should be able to investigate the following sorts of questions. 1. How is voltage related to light bulb brightness? 2. What is the shape of the V-I curve for various objects? 3. Does it make a difference in which direction the current is flowing? HYPOTHESIS OR PREDICTION It is intended that students will discover the non-ohmic nature of some of the available objects. EXPERIMENTAL DESIGN Questions to encourage good design could include: 1. What variables need to be considered? 2. What variable do you wish to change? 3. What variable(s) will you measure? Set up a procedure for your lab and have the teacher check it before you begin. Checkpoint (Teacher checks students experimental design for feasibility. Such things as limits of range of voltage, changing one variable at a time, having sufficient detail so that someone can repeat and remember the experiment should be checked) PLAN FOR DATA COLLECTION & ANALYSIS Checkpoint (Teacher checks students plan for feasibility.) CONDUCTING THE EXPERIMENT Checkpoint (Teacher monitors students investigations in progress. ANALYSIS OF DATA Checkpoint (Teacher checks students analysis.)
10 DISCUSSION OF RESULTS Groups may compare notes either as an entire class moderated by the instructor or starting with pairs of groups and working up to the entire class. This process might consist of: 1. sharing results 2. comparing results (recognizing similarities and differences) 3. resolving differences 4. relating findings to everyday life Possible questions might include: 1. How could you make use of the non-ohmic object? (find direction of current flow, keep current from flowing in a direction) 2. Have you seen any applications of the object you evaluated? (indicators, clock and electronics displays.) V. EVALUATION POST-LAB SURVEY OF STUDENTS CONCEPTIONS Have students retake the Pre-Lab Exercise. Compare pre-lab and post-lab responses. TRADITIONAL (Regents questions on E&M) ALTERNATIVE Hookes s Law describes the relationship between extension and applied force for a linear spring. An object which obeys Hooke s Law is called elastic. Have the students propose an analogy between elastic objects and ohmic objects including an experiment to determine which objects are elastic and which are inelastic. F = k x vs V = R I. This material is based upon work supported by the National Science Foundation under Grant No. ESI Any opinions, findings, and conclusions or recommendations expressed in this material are those of the author(s) and do not necessarily reflect the views of the National Science Foundation.
11 SOTM LAB: P16 STUDENT LAB: OHM S LAW DEVELOPERS OF LAB: John Lane, JD853@maristb.marist.edu Taylor Pancoast, JD573@maristb.marist.edu OVERVIEW OF LAB This lab is about how electricity moves. SAFETY CONSIDERATIONS Whenever electrical devices are used there is a potential for electrical shock. Work areas must be kept clear of liquids (no drinks), and care must be taken to disconnect any devices or circuits from all power sources before working on them. Be aware that computer and electrical equipment can be fragile. PART I: PRE-LAB A conductivity test circuit has been set up using an Electronics Laboratory patch board with two batteries and a bulb in series with the two 10-inch wire leads as in Figure 1. Use the leads to test various objects available from your instructor. For each object write down the brightness of the light bulb. As a group, write down one or more explanations of your recorded results to be shared with the entire class. QUESTIONS TO CONSIDER: Figure 1 Pre-lab Patch Board Setup 1. How do the results for various objects differ (if they do)?
12 2. Are there different types of objects? 3. Can you devise a scheme for predicting the results for new objects? (If so do so.) 4. Can you suggest any explanations or generalizations for how electricity flows? (If so do so.) 5. What is the function of the battery? 6. How could you test your ideas? 7. If you wanted to measure the flow of electricity what aspects of the flow might you measure? PART II: EXPLORATION: After the class has discussed the results of part I, your instructor will demonstrate how to measure quantitatively three aspects of electrical flow using the circuit shown below in Figure 2. FIGURE 2. Exploration and Elaboration Patch Board Setup QUESTIONS TO CONSIDER : 7. What will happen to the current if you increase the voltage? 8. What will happen to the current if you decrease the voltage? 9. What happens if you change the sign of the voltage? 10. What is the shape of the curve 11. How does the slope of the curve compare at different currents? 12. What happens in the circuit when the slope increases? Decreases?
13 PART III: ELABORATION PROBLEM Write down at least two questions about electrical current flow. Write down ways to investigate the answers to those questions using the equipment provided. THINGS TO KEEP IN MIND: 1. It may be possible to use additional equipment if it is readily available. (Check with your instructor.) 2. What variables need to be considered? 3. What variable do you wish to change? 4. What variable(s) will you measure? 5. Before writing out your procedure, check with your instructor. HYPOTHESIS OR PREDICTION Predict the results of your proposed experiment. EXPERIMENTAL DESIGN Write out a procedure for your lab and have the teacher check it before you set up. CONDUCTING THE EXPERIMENT Set up your experiment and check with your instructor before you start to collect data. ANALYSIS OF DATA How do you wish to present your data? Does your data agree with you prediction? DISCUSSION OF RESULTS 5. Prepare your question, prediction and data for presentation. 6. Compare your results with those of other groups (what are the similarities and differences?) 7. Resolve any differences. 8. Give examples of how these results help you to understand things in everyday life. 9. Suggest some possible uses for the object(s) investigated. This material is based upon work supported by the National Science Foundation under Grant No. ESI Any opinions, findings, and conclusions or recommendations expressed in this material are those of the author(s) and do not necessarily reflect the views of the National Science Foundation.
14 PRE-LAB QUESTIONNAIRE 12. What is electricity? 13. What happens when an object conducts electricity? 14. Give an example of an object that conducts electricity. 15. What kinds of objects conduct electricity? 16. Give an example of an object that does not conduct electricity. 17. What kinds of objects do not conduct electricity? 18. What is an electrical circuit? 19. What is required for a circuit to conduct electricity? 20. How do you measure the amount of electricity conducted? 21. What controls how much electricity an object conducts? 22. Please list and define any terms you would use to discuss electricity.
SOTM LAB: P14R I. TEACHER NOTES & GUIDELINES. Lee Cabe, JD863 OVERVIEW OF LAB DESCRIPTION
SOTM LAB: P14R I. TEACHER NOTES & GUIDELINES TITLE OF LAB: Force Table Exploration DEVELOPERS OF LAB: Ron McDermott, JD566 Lee Cabe, JD863 OVERVIEW OF LAB DESCRIPTION In this lab students will experiment
More informationExperiment P43: RC Circuit (Power Amplifier, Voltage Sensor)
PASCO scientific Vol. 2 Physics Lab Manual: P43-1 Experiment P43: (Power Amplifier, Voltage Sensor) Concept Time SW Interface Macintosh file Windows file circuits 30 m 700 P43 P43_RCCI.SWS EQUIPMENT NEEDED
More informationName Class Date. RC Circuit Lab
RC Circuit Lab Objectives: Students will be able to Use the ScienceWorkshop interface to investigate the relationship between the voltage remaining across a capacitor and the time taken for the discharge
More informationThe Digital Multimeter (DMM)
The Digital Multimeter (DMM) Since Physics 152 covers electricity and magnetism, the analysis of both DC and AC circuits is required. In the lab, you will need to measure resistance, potential (voltage),
More informationElectron Theory of Charge. Electricity. 1. Matter is made of atoms. Refers to the generation of or the possession of electric charge.
Electricity Refers to the generation of or the possession of electric charge. There are two kinds of electricity: 1. Static Electricity the electric charges are "still" or static 2. Current Electricity
More informationPHY222 - Lab 7 RC Circuits: Charge Changing in Time Observing the way capacitors in RC circuits charge and discharge.
PHY222 Lab 7 RC Circuits: Charge Changing in Time Observing the way capacitors in RC circuits charge and discharge. Print Your Name Print Your Partners' Names You will return this handout to the instructor
More informationMeasuring the time constant for an RC-Circuit
Physics 8.02T 1 Fall 2001 Measuring the time constant for an RC-Circuit Introduction: Capacitors Capacitors are circuit elements that store electric charge Q according to Q = CV where V is the voltage
More informationOld Dominion University Physics 112N/227N/232N Lab Manual, 13 th Edition
RC Circuits Experiment PH06_Todd OBJECTIVE To investigate how the voltage across a capacitor varies as it charges. To find the capacitive time constant. EQUIPMENT NEEDED Computer: Personal Computer with
More informationFundamentals 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 informationCapacitors 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 informationLab 10: DC RC circuits
Name: Lab 10: DC RC circuits Group Members: Date: TA s Name: Objectives: 1. To understand current and voltage characteristics of a DC RC circuit 2. To understand the effect of the RC time constant Apparatus:
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 information( ) ( ) = q o. T 12 = τ ln 2. RC Circuits. 1 e t τ. q t
Objectives: To explore the charging and discharging cycles of RC circuits with differing amounts of resistance and/or capacitance.. Reading: Resnick, Halliday & Walker, 8th Ed. Section. 27-9 Apparatus:
More informationLab #6 Ohm s Law. Please type your lab report for Lab #6 and subsequent labs.
Dr. Day, Fall 2004, Rev. 06/22/10 HEFW PH 262 Page 1 of 4 Lab #6 Ohm s Law Please type your lab report for Lab #6 and subsequent labs. Objectives: When you have completed this lab exercise you should be
More informationFigure 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 informationNotebook 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 informationSTUDENT LABORATORY Plant Respiration and Photosynthesis
Pasco Plant Respiration and Photosynthesis Page 1 of 5 STUDENT LABORATORY Plant Respiration and Photosynthesis Grade (Out of 20): Lab Credits: Full Name: Lab Section: Lab Instructor: Lab Date: Credit:
More informationPHYS320 ilab (O) Experiment 2 Instructions Conservation of Energy: The Electrical Equivalent of Heat
PHYS320 ilab (O) Experiment 2 Instructions Conservation of Energy: The Electrical Equivalent of Heat Objective: The purpose of this activity is to determine whether the energy dissipated by a heating resistor
More informationRC Circuit (Power amplifier, Voltage Sensor)
Object: RC Circuit (Power amplifier, Voltage Sensor) To investigate how the voltage across a capacitor varies as it charges and to find its capacitive time constant. Apparatus: Science Workshop, Power
More informationRC Circuit Lab - Discovery PSI Physics Capacitors and Resistors
1 RC Circuit Lab - Discovery PSI Physics Capacitors and Resistors Name Date Period Purpose The purpose of this lab will be to determine how capacitors behave in R-C circuits. The manner in which capacitors
More informationLab 1 Uniform Motion - Graphing and Analyzing Motion
Lab 1 Uniform Motion - Graphing and Analyzing Motion Objectives: < To observe the distance-time relation for motion at constant velocity. < To make a straight line fit to the distance-time data. < To interpret
More informationLab 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 informationIntroduction to Electrical Theory
Youth xplore Trades Skills Introduction to lectrical Theory Description Working as an electrician requires many skills. The physical demands of the job are one important part of the skills needed to succeed.
More informationAP Physics 1 Syllabus
AP Physics 1 Syllabus Course Overview AP Physics 1 will meet for 90 minutes on A-B scheduling and for 45 minutes on regular scheduling. Class activities will include lecture, demonstration, problem solving
More informationKinematics Lab. 1 Introduction. 2 Equipment. 3 Procedures
Kinematics Lab 1 Introduction An object moving in one dimension and undergoing constant or uniform acceleration has a position given by: x(t) =x 0 +v o t +1/2at 2 where x o is its initial position (its
More informationLesson Plan: Electric Circuits (~130 minutes) Concepts
Lesson Plan: Electric Circuits (~130 minutes) Concepts 1. Electricity is the flow of electric charge (electrons). 2. Electric Charge is a property of subatomic particles. 3. Current is the movement of
More informationExperiment 4. RC Circuits. Observe and qualitatively describe the charging and discharging (decay) of the voltage on a capacitor.
Experiment 4 RC Circuits 4.1 Objectives Observe and qualitatively describe the charging and discharging (decay) of the voltage on a capacitor. Graphically determine the time constant τ for the decay. 4.2
More informationAn 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 informationLab 4 Series and Parallel Resistors
Lab 4 Series and Parallel Resistors What You Need To Know: The Physics Last week you examined how the current and voltage of a resistor are related. This week you are going to examine how the current and
More informationMaterials Needed 1 D-Cell battery 6 6-inch pieces of wire 3 flashlight light bulbs 3 light bulb holders (optional)
Experiment Module 3 Electric Circuits Objective/Introduction This experiment explores building simple circuits and testing Ohm s Law. Students will start lighting a simple light bulb. Then they will explore
More informationPossible Prelab Questions.
Possible Prelab Questions. Read Lab 2. Study the Analysis section to make sure you have a firm grasp of what is required for this lab. 1) A car is travelling with constant acceleration along a straight
More informationLab 6: Capacitors and Resistor-Capacitor Circuits Phy208 Spr 2008 Name Section
: Capacitors and Resistor-Capacitor Circuits Phy208 Spr 2008 Name Section Your TA will use this sheet to score your lab. It is to be turned in at the end of lab. You must use complete sentences and clearly
More informationCHEMISTRY 170. Radioisotopes
CHEMISTRY 170 Radioisotopes Positron Emission Tomography or PET scans use the radioisotope 18 F to create an image of the brain. DEPARTMENT OF CHEMISTRY UNIVERSITY OF KANSAS Radioisotopes Introduction
More informationMASSACHUSETTS INSTITUTE OF TECHNOLOGY Department of Physics Spring Experiment 5: Faraday s Law
MASSACHUSETTS INSTITUTE OF TECHNOLOGY Department of Physics 8.02 Spring 2009 OBJECTIVES Experiment 5: Faraday s Law 1. To become familiar with the concepts of changing magnetic flux and induced current
More informationElectroscope Used to are transferred to the and Foil becomes and
Electricity Notes Chapter 17 Section 1: Electric Charge and Forces Electric charge is a variety of independent all with one single name. Electricity is related to, and both (-) and (+) carry a charge.
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 informationCHEMISTRY 130 General Chemistry I. Radioisotopes
CHEMISTRY 130 General Chemistry I Radioisotopes Positron Emission Tomography or PET scans use the radioisotope 18 F to create an image of the brain. DEPARTMENT OF CHEMISTRY UNIVERSITY OF KANSAS Radioisotopes
More informationPhysics Labs with Computers, Vol. 1 P14: Simple Harmonic Motion - Mass on a Spring A
Activity P14: Simple Harmonic Motion - Mass on a Spring (Force Sensor, Motion Sensor) Concept DataStudio ScienceWorkshop (Mac) ScienceWorkshop (Win) Harmonic motion P14 SHM.DS P19 SHM Mass on a Spring
More informationEXPERIMENT 9 Superconductivity & Ohm s Law
Name: Date: Course number: MAKE SURE YOUR TA OR TI STAMPS EVERY PAGE BEFORE YOU START! Lab section: Partner's name(s): Grade: EXPERIMENT 9 Superconductivity & Ohm s Law 0. Pre-Laboratory Work [2 pts] 1.
More informationActivity P20: Conservation of Mechanical Energy (Force Sensor, Photogate)
Name Class Date Activity P20: Conservation of Mechanical Energy (Force Sensor, Photogate) Concept DataStudio ScienceWorkshop (Mac) ScienceWorkshop (Win) Energy P20 Mechanical Energy.DS P23 Cons. Mechanical
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 informationLAB 3: Capacitors & RC Circuits
LAB 3: Capacitors & C Circuits Name: Circuits Experiment Board Wire leads Capacitors, esistors EQUIPMENT NEEDED: Two D-cell Batteries Multimeter Logger Pro Software, ULI Purpose The purpose of this lab
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 informationLab 3. Ohm s Law. Goals. Introduction
Lab 3. Ohm s Law Goals To underst Ohm s law, used to describe behavior of electrical conduction in many materials circuits. To calculate electrical power dissipated as heat. To underst use a rheostat,
More informationSimple circuits - 3 hr
Simple circuits - 3 hr Resistances in circuits Analogy of water flow and electric current An electrical circuit consists of a closed loop with a number of different elements through which electric current
More informationLab 5 RC Circuits. What You Need To Know: Physics 212 Lab
Lab 5 R ircuits What You Need To Know: The Physics In the previous two labs you ve dealt strictly with resistors. In today s lab you ll be using a new circuit element called a capacitor. A capacitor consists
More informationProperties of Electric Charge
1 Goals 2 Properties of Electric Charge 2 Atomic Structure: Composed of three main particles: 1. Proton 2. Neutron 3. Electron Things to Remember: 3 Everything is made of atoms. Electrons can move from
More informationPOLYTECHNIC UNIVERSITY Electrical Engineering Department. EE SOPHOMORE LABORATORY Experiment 2 DC circuits and network theorems
POLYTECHNIC UNIVERSITY Electrical Engineering Department EE SOPHOMORE LABORATORY Experiment 2 DC circuits and network theorems Modified for Physics 18, Brooklyn College I. Overview of Experiment In this
More informationME 3210 Mechatronics II Laboratory Lab 4: DC Motor Characteristics
ME 3210 Mechatronics II Laboratory Lab 4: DC Motor Characteristics Introduction Often, due to budget constraints or convenience, engineers must use whatever tools are available to create new or improved
More informationDriven Harmonic Oscillator
Driven Harmonic Oscillator Physics 6B Lab Experiment 1 APPARATUS Computer and interface Mechanical vibrator and spring holder Stands, etc. to hold vibrator Motion sensor C-209 spring Weight holder and
More informationUniversity of Maryland Department of Physics. Spring 2009 Final Exam 20. May (175 points) Post grades on web? (Initial, please) Yes No
University of Maryland Department of Physics Physics 122 20. May 2009 (175 points) Post grades on web? (Initial, please) Yes No (If you agree, I will post your grades and your detailed scores for each
More informationLab 5 - Capacitors and RC Circuits
Lab 5 Capacitors and RC Circuits L51 Name Date Partners Lab 5 Capacitors and RC Circuits OBJECTIVES To define capacitance and to learn to measure it with a digital multimeter. To explore how the capacitance
More informationGreek Letter Omega Ω = Ohm (Volts per Ampere)
) What is electric current? Flow of Electric Charge 2) What is the unit we use for electric current? Amperes (Coulombs per Second) 3) What is electrical resistance? Resistance to Electric Current 4) What
More informationReview of Ohm's Law: The potential drop across a resistor is given by Ohm's Law: V= IR where I is the current and R is the resistance.
DC Circuits Objectives The objectives of this lab are: 1) to construct an Ohmmeter (a device that measures resistance) using our knowledge of Ohm's Law. 2) to determine an unknown resistance using our
More information3. The figure above shows two pith balls suspended by threads from a support. In the figure,
3. The figure above shows two pith balls suspended by threads from a support. In the figure, Student ID: 22133336 Exam: 002901RR - Electronics Basics When you have completed your exam and reviewed your
More informationElectricity
Electricity Electric Charge There are two fundamental charges in the universe. Positive (proton) has a charge of +1.60 x 10-19 C Negative (electron) has a charge of 1.60 x 10-19 C There is one general
More informationName: Lab Partner: Section:
Chapter 6 Capacitors and RC Circuits Name: Lab Partner: Section: 6.1 Purpose The purpose of this experiment is to investigate the physics of capacitors in circuits. The charging and discharging of a capacitor
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 informationElectricity MR. BANKS 8 TH GRADE SCIENCE
Electricity MR. BANKS 8 TH GRADE SCIENCE Electric charges Atoms and molecules can have electrical charges. These are caused by electrons and protons. Electrons are negatively charged. Protons are positively
More informationLab 5 CAPACITORS & RC CIRCUITS
L051 Name Date Partners Lab 5 CAPACITORS & RC CIRCUITS OBJECTIVES OVERVIEW To define capacitance and to learn to measure it with a digital multimeter. To explore how the capacitance of conducting parallel
More informationPhysics 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 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 informationLab 5 RC Circuits. What You Need To Know: Physics 212 Lab
Lab 5 R ircuits What You Need To Know: The Physics In the previous two labs you ve dealt strictly with resistors. In today s lab you ll be using a new circuit element called a capacitor. A capacitor consists
More informationEE301 RESISTANCE AND OHM S LAW
Learning Objectives a. Describe the concept of resistance b. Use Ohm s law to calculate current, voltage, and resistance values in a circuit c. Discuss the difference between an open circuit and a short
More informationElectric Fields and Potentials
Electric Fields and Potentials INTRODUCTION Physicists use the concept of a field to explain the interaction of particles or bodies through space, i.e., the action-at-a-distance force between two bodies
More informationELECTRICITY UNIT REVIEW
ELECTRICITY UNIT REVIEW S1-3-04: How does the Atomic Model help to explain static electricity? 1. Which best describes static electricity? a) charges that can be collected and held in one place b) charges
More information3.14 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 informationLab 5 - Capacitors and RC Circuits
Lab 5 Capacitors and RC Circuits L51 Name Date Partners Lab 5 Capacitors and RC Circuits OBJECTIVES To define capacitance and to learn to measure it with a digital multimeter. To explore how the capacitance
More informationENERGY AND TIME CONSTANTS IN RC CIRCUITS By: Iwana Loveu Student No Lab Section: 0003 Date: February 8, 2004
ENERGY AND TIME CONSTANTS IN RC CIRCUITS By: Iwana Loveu Student No. 416 614 5543 Lab Section: 0003 Date: February 8, 2004 Abstract: Two charged conductors consisting of equal and opposite charges forms
More informationDynamics Track Momentum, Energy, and Collisions
Dynamics Track Momentum, Energy, and Collisions Student Handout Collisions between objects create some interesting questions about which conservation laws apply. In this lab you will be comparing elastic
More informationStudy Guide. Science 3103 Electricity. Adult Basic Education Science. Prerequisite: Science Credit Value: 1
Adult Basic Education Science Electricity Study Guide Prerequisite: Science 3102 Credit Value: 1 Text: Nelson Physics 12: College Preparation; Hirsch, Alan J.; Nelson Thomson Canada; 2004. Science Courses
More informationPhysics Labs with Computers, Vol. 1 P05: Free Fall (Picket Fence) A
Name Class Date Lab 4: Acceleration of a Freely Falling Picket Fence (Photogate) Concept DataStudio ScienceWorkshop (Mac) ScienceWorkshop (Win) Linear motion P05 Free Fall.ds P06 Free Fall Picket Fence
More informationCircuit Analysis and Ohm s Law
Study Unit Circuit Analysis and Ohm s Law By Robert Cecci Circuit analysis is one of the fundamental jobs of an electrician or electronics technician With the knowledge of how voltage, current, and resistance
More informationDemonstration 1: Faraday Ice Pail and Charge Production
Osservazioni e Misure Lezioni I e II Laboratorio di Elettromagnetismo Demonstration 1: Faraday Ice Pail and Charge Production Equipment Required: Electrometer (ES-9078) Charge Producers (ES-9057B) Earth
More informationEXPERIMENT 5A RC Circuits
EXPERIMENT 5A Circuits Objectives 1) Observe and qualitatively describe the charging and discharging (decay) of the voltage on a capacitor. 2) Graphically determine the time constant for the decay, τ =.
More informationCASTLE Unit 2-READING 1
Schematic Diagram Figures CASTLE Unit 2-EADING 1 Up to this point in our study of electricity, we have been representing our circuits by drawing real life pictures of the circuit components. As we begin
More informationCircular Motion and Centripetal Force
[For International Campus Lab ONLY] Objective Measure the centripetal force with the radius, mass, and speed of a particle in uniform circular motion. Theory ----------------------------- Reference --------------------------
More informationPHY222 Lab 8 - Magnetic Fields and Right Hand Rules Magnetic forces on wires, electron beams, coils; direction of magnetic field in a coil
PHY222 Lab 8 - Magnetic Fields and Right Hand Rules Magnetic forces on wires, electron beams, coils; direction of magnetic field in a coil Print Your Name Print Your Partners' Names You will return this
More informationName: 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 informationSection 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 informationElectric Field and Electric Potential
Electric Field and Electric Potential INTRODUCTION Physicists use the concept of a field 1 to explain the interaction of particles or bodies through space, i.e., the action-at-a-distance 2 force between
More informationElectricity 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 informationWhat is dynamic electricity?
Dynamic Electricity What is dynamic electricity? Has to do with charges in motion So we re talking about moving electrons Think about any electronic device Dynamic electricity Think back to properties
More informationElectric Field Mapping (approx. 2 h 15 min.) (8/8/2018)
Electric Field Mapping (approx. 2 h 15 min.) (8/8/2018) Equipment shallow glass pan pitcher for water masking tape graph paper (8.5 x14 ) colored pencils metal shapes sand paper paper towels DC power supply
More informationElectric Field Mapping
Electric Field Mapping Equipment: mapping board, U-probe, 5 resistive boards, templates, 4 long leads, Phywe 07035.00 voltmeter, DC wall voltage output, 3 pieces of paper Precautions 1. Before turning
More information7th 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 informationEquipotential and Electric Field Mapping
Experiment 2 Equipotential and Electric Field Mapping 2.1 Objectives 1. Determine the lines of constant electric potential for two simple configurations of oppositely charged conductors. 2. Determine the
More informationELECTRICITY. Electric Circuit. What do you already know about it? Do Smarty Demo 5/30/2010. Electric Current. Voltage? Resistance? Current?
ELECTRICITY What do you already know about it? Voltage? Resistance? Current? Do Smarty Demo 1 Electric Circuit A path over which electrons travel, out through the negative terminal, through the conductor,
More informationExperiment 3. Electrical Energy. Calculate the electrical power dissipated in a resistor.
Experiment 3 Electrical Energy 3.1 Objectives Calculate the electrical power dissipated in a resistor. Determine the heat added to the water by an immersed heater. Determine if the energy dissipated by
More informationElectricity and Magnetism
Electricity and Magnetism S8P5. Students will recognize the characteristics of gravity, electricity, and magnetism as major kinds of forces acting in nature. b. Demonstrate the advantages and disadvantages
More informationInsulators Non-metals are very good insulators; their electrons are very tightly bonded and cannot move.
SESSION 11: ELECTRIC CIRCUITS Key Concepts Resistance and Ohm s laws Ohmic and non-ohmic conductors Series and parallel connection Energy in an electric circuit X-planation 1. CONDUCTORS AND INSULATORS
More informationRelating Voltage, Current and Resistance
Relating Voltage, Current and Resistance Using Ohm s Law in a simple circuit. A Simple Circuit Consists of:! A voltage source often a battery! A load such as a bulb! Conductors arranged to complete a circuit
More information2. 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 informationPHY222 Lab 2 - Electric Fields Mapping the Potential Curves and Field Lines of an Electric Dipole
Print Your Name PHY222 Lab 2 - Electric Fields Mapping the Potential Curves and Field Lines of an Electric Dipole Print Your Partners' Names Instructions January 23, 2015 Before lab, read the Introduction,
More informationHooke s Law. Equipment. Introduction and Theory
Hooke s Law Objective to test Hooke s Law by measuring the spring constants of different springs and spring systems to test whether all elastic objects obey Hooke s Law Equipment two nearly identical springs,
More informationLab 11 Simple Harmonic Motion A study of the kind of motion that results from the force applied to an object by a spring
Lab 11 Simple Harmonic Motion A study of the kind of motion that results from the force applied to an object by a spring Print Your Name Print Your Partners' Names Instructions April 20, 2016 Before lab,
More informationLab 4 CAPACITORS & RC CIRCUITS
67 Name Date Partners Lab 4 CAPACITORS & RC CIRCUITS OBJECTIVES OVERVIEW To define capacitance and to learn to measure it with a digital multimeter. To explore how the capacitance of conducting parallel
More informationElectric Current Unlike static electricity, electric current is a continuous flow of charged particles (electricity). For current to flow, there must
CURRENT ELECTRICITY Electric Current Unlike static electricity, electric current is a continuous flow of charged particles (electricity). For current to flow, there must be a power source and there must
More informationECE 220 Laboratory 4 Volt Meter, Comparators, and Timer
ECE 220 Laboratory 4 Volt Meter, Comparators, and Timer Michael W. Marcellin Please follow all rules, procedures and report requirements as described at the beginning of the document entitled ECE 220 Laboratory
More informationAcademic Physics Spring Semester Final Review
Spring Semester Final Review The Final will be 70 multiple choice questions. This review is intended to be a review and not all inclusive. You must study your notes, labs, quizzes and tests in order to
More information