Chapter 18 Electric Current and Circuits


 Peregrine Allison
 1 years ago
 Views:
Transcription
1 Chapter 18 Electric Current and Circuits 3. When a current flows down a wire: A. electrons are moving in the direction of the current. B. electrons are moving opposite the direction of the current. C. protons are moving in the direction of the current. D. protons are moving opposite the direction of the current. E. both protons and electrons are moving in the direction of the current. 4. In a liquid, a current is set up between points A and B. Positive ions are going from A to B moving 6.0 coulombs of positive charge per second and negative charges are moving from B to A moving 2.0 coulombs of negative charge per second. What is the current from A to B? A. 8.0 A B A C. 4.0 A D A E. 12 A 6. A 2.50 A current is carried by a copper wire of radius 1.0 mm. If the density of conduction electrons is /m 3, what is the drift velocity of the conduction electrons? A m/s B m/s C m/s D m/s E. 6.2 x105 m/s 1
2 7. Two copper wires, one double the diameter of the other, have the same current flowing through them. If the thinner wire has a drift velocity v 1, and the thicker wire has a drift velocity v 2, how do the drift velocities of the charge carriers compare? A. v 1 = v 2 B. v 1 = 2 v 2 C. 2 v 1 = v 2 D. v 1 = 4 v 2 E. 4 v 1 = v A length L 0 of wire has a resistance of 32.0 Ω. The wire is uniformly stretched to four times its original length, i.e., 4 L 0. If a length L 0 is now cut from the stretched wire, what is its resistance? A. 512 Ω B. 128 Ω C Ω D Ω E Ω 15. The resistance of a wire increases 3.9% when the temperature of the wire is raised 100 C. What is the temperature coefficient of resistivity of the wire material? A. 3.9 C 1 B C 1 C C 1 D C 1 E C A resistor has a resistance of 30 Ω at 20 C. If the temperature coefficient is C 1, what is its resistance at 200 C? A. 24 Ω B. 27 Ω C. 48 Ω D. 54 Ω E. 57 Ω 2
3 17. A 1.56V battery has an internal resistance of Ω. What is the maximum current that can be drawn from this battery? A. infinite (or at least 1000's of amps) B A C A D A E A 18. A potential difference of 12.4 V is placed across a 4.1 Ω resistor. What is the current in the resistor? A. 51 A B. 3.0 A C A D. 16A E. 8.3 A 20. A variable resistor has a voltage of 12.0 V placed across it. If the resistance is increased 20%, what happens to the current through it? A. It increases 20%. B. It increases 25%. C. It decreases 20%. D. It decreases 25%. E. It decreases 17%. 21. A 12.0 V battery is placed across a 4.00 Ω resistor. If the current through the resistor is 2.80 A, what is the internal resistance of the battery? A Ω B Ω C Ω D Ω E Ω 3
4 25. The potential differences around a loop ABCA in a circuit (starting at A and going back to A. are V AB = 10 V, V BC = 6.0 V, and V CA. What is V CA? A. 16 V B. 4.0 V C V D. 16 V E. 12 V 28. Four 12 Ω resistors are connected together. Which of the following resistances cannot be formed using all 4 resistors? A. 48 Ω B. 9.0 Ω C. 12 Ω D. 60 Ω E. 20 Ω 31. What is the resistance of the combination of resistors? A. 4.0 Ω B. 12 Ω C. 13 Ω D. 14 Ω E. 15 Ω 4
5 33. Capacitors of values 6.00 mf and 9.00 mf are connected in series to a 30.0 V power supply. What is the resulting charge on the 6.00 mf capacitor? A. 180 mc B. 270 mc C mc D. 108 mc E. 200 mc 34. Capacitors of values 6.0 mf and 9.0 mf are connected in series to a 30.0 V power supply. What is the resulting potential difference across the 6.0 mf capacitor? A. 30 V B. 18 V C. 12 V D. 6.0 V E. 3.0 V 35. Capacitors of values 1.0 F, 2.0 F, 3.0 F, and 6.0 F are connected in series across a 12 V power supply. Which capacitor has the greatest potential difference across it? A. The 1.0 F capacitor B. The 2.0 F capacitor C. The 3.0 F capacitor D. The 6.0 F capacitor E. They all are equal. 36. Capacitors of values 1.0 F, 2.0 F, 3.0 F, and 6.0 F are connected in series across a 12 V power supply. Which capacitor has the greatest charge on it? A. The 1.0 F capacitor. B. The 2.0 F capacitor. C. The 3.0 F capacitor. D. The 6.0 F capacitor. E. They are all equal. 5
6 37. The arrangement is composed of four 6.0 mf capacitors. What is the capacitance of the combination? A mf B. 4.5 mf C. 8.0 mf D. 9.0 mf E mf 38. In the diagram, each resistor is 3 ohms and the battery is 9 volts. What is the current through the middle resistor? A. 3 A to the right B. 3 A to the left C. 9 A to the right D. 9 A to the left E. 1 A to the left 39. Three resistors, R 1 = 4 Ω, R 2 = 3.0 Ω, and R 3 = 2.0 Ω, are connected in series to a 9.0 V battery. What is the power dissipated by R 1? A. 2.0 W B. 4.0 W C. 5.1 W D. 9.0 W E. 2.3 W 6
7 40. In the diagram, if the current through R 1 is 5 A up and if the current through R 3 is 3 A up, what is the current in R 2? A. 8 A up B. 8 A down C. 2 A up D. 2 A down E. More information is needed. 42. If R 1 = 6.0 Ω, R 2 = 8.0 Ω, R 3 = 2.0 Ω, ε 1 = 4.0 V, and ε 2 = 14 V, what is the power supplied to the circuit by ε 1? A. 4.0 W B. 8.0 W C. 12 W D. 16 W E. 20 W 46. Raising the current through a resistor from 8.50 A to 11.3 A increases the power by: A. 33.0%. B. 77.0%. C. 113%. D. 157%. E. 0% (no change). 7
8 51. A flashlight, which uses two 1.5 V batteries in series, is turned on for 2.0 minutes. If the current in the flashlight is 100 ma, what is the energy dissipated? A. 12 J B. 9.0 J C. 72 J D. 36 J E. 18 J 53. A 2.0 Ω resistor is connected across a 6.0 V power supply. An ammeter with internal resistance of 1.0 Ω is used to measure the current in this circuit. What is the ammeter reading? A. 4.0 A B. 3.0 A C. 2.0 A D. 1.0 A E. An ammeter with less resistance than the rest of the circuit will not produce a reading. 54. A 1000 Ω resistor is in a circuit with 30.0 ma flowing through it. A voltmeter with internal resistance 1000 Ω is used to measure the voltage across the resistor. What is the reading from the voltmeter if 30.0 ma still flows in the circuit? A V B V C V D V E V 55. A series circuit consists of a 12.0 V source of emf, a 2.00 mf capacitor, a 1000 Ω resistor, and a switch. What is the time constant for this circuit? A s B s C s D s E ms 8
9 56. A series circuit consists of a 1.02 V source of emf, a 2.00 mf capacitor, a 1000 Ω resistor, and a switch. When the switch is closed, how long does it take for the current to reach onehalf its maximum value? A s B s C s D s E s 59. A capacitor is connected in series with a resistor and a switch. With the switch open, the capacitor is charged to 9.0 V. When the switch is closed, how long will it take for the voltage across the capacitor to drop to 6.0 V if the time constant of the circuit is 4.0 s? A. 0.3 s B. 1.2 s C. 1.6 s D. 2.7 s E. 12 s 9
10 1
Electrostatics. Electrostatics Version 2
1. A 150watt lightbulb is brighter than a 60.watt lightbulb when both are operating at a potential difference of 110 volts. Compared to the resistance of and the current drawn by the 150watt lightbulb,
More informationMULTIPLE CHOICE. Choose the one alternative that best completes the statement or answers the question.
MULTIPLE CHOICE. Choose the one alternative that best completes the statement or answers the question. 1) If the voltage at a point in space is zero, then the electric field must be A) zero. B) positive.
More informationChapter 11 Electricity
Chapter 11 Electricity Course Content Definition of Electricity Circuit Diagrams Series and Parallel Circuits Calculating total resistances Measurement of Electricity Ammeters and Voltmeters Ohm s Law
More informationElectric circuits, Current, and resistance (Chapter 22 and 23)
Electric circuits, Current, and resistance (Chapter 22 and 23) Acknowledgements: Several Images and excerpts are taken from College Physics: A strategic approach, Pearson Education Inc Current If electric
More informationLecture 10. Resistor Circuits, Batteries and EMF
Lecture 10. Resistor Circuits, Batteries and EMF Outline: Connection of Resistors: In Parallel and In Series. Batteries. Nonideal batteries: internal resistance. Potential distribution around a complete
More informationAP Physics Electricity and Magnetism #4 Electrical Circuits, Kirchoff s Rules
Name Period AP Physics Electricity and Magnetism #4 Electrical Circuits, Kirchoff s Rules Dr. Campbell 1. Four 240 Ω light bulbs are connected in series. What is the total resistance of the circuit? What
More information7. What is the current in a circuit if 15 coulombs of electric charge move past a given point in 3 seconds? (1) 5 A (3) 18 A (2) 12 A (4) 45 A
1. Compared to the number of free electrons in a conductor, the number of free electrons in an insulator of the same volume is less the same greater 2. Most metals are good electrical conductors because
More informationUnit 7: Electric Circuits
Multiple Choice Portion 1. The diagram below shows part of an electrical circuit. Unit 7: Electric Circuits 4. A 12 V battery supplies a 5.0 A current to two light bulbs as shown below. What are the magnitude
More informationQuestion Bank. Electric Circuits, Resistance and Ohm s Law
Electric Circuits, Resistance and Ohm s Law. Define the term current and state its SI unit. Ans. The rate of flow of charge in an electric circuit is called current. Its SI unit is ampere. 2. (a) Define
More informationANSWERS to CIRCUITS V
1 ANSWERS to CIRCUITS 1. The speed with which electrons move through a copper wire is typically 104 m s 1. a. Explain why is it that the electrons cannot travel faster in the conductor? b. Explain why
More informationThe current that flows is determined by the potential difference across the conductor and the resistance of the conductor (Ohm s law): V = IR P = VI
PHYS1000 DC electric circuits 1 Electric circuits Electric current Charge can move freely in a conductor if an electric field is present; the moving charge is an electric current (SI unit is the ampere
More informationStudents will need about 30 minutes to complete these constructed response tasks.
Electric Title of Circuits Concept Constructed Response Teacher Guide Students will need about 30 minutes to complete these constructed response tasks. Objectives assessed: Understand the functions of
More informationCurrent, Resistance and Electromotive Force. Young and Freedman Chapter 25
Current, Resistance and Electromotive Force Young and Freedman Chapter 25 Electric Current: Analogy, water flowing in a pipe H 2 0 gallons/minute Flow Rate is the NET amount of water passing through a
More informationCapacitance, Resistance, DC Circuits
This test covers capacitance, electrical current, resistance, emf, electrical power, Ohm s Law, Kirchhoff s Rules, and RC Circuits, with some problems requiring a knowledge of basic calculus. Part I. Multiple
More informationChapter 27 = J. U = 120Ah 3600s 1h. Now we compute how long we can deliver a power of 100 W with this energy available.
Chapter 7 7. A certain car battery with 1.0 V emf has an initial carge of 10 A h. Assuming that the potential across the terminals stays constant until the battery is completely discharged, for how many
More informationPhysics 1653 Exam 3  Review Questions
Physics 1653 Exam 3  Review Questions 3.0 Two uncharged conducting spheres, A and B, are suspended from insulating threads so that they touch each other. While a negatively charged rod is held near, but
More information= (0.400 A) (4.80 V) = 1.92 W = (0.400 A) (7.20 V) = 2.88 W
Physics 2220 Module 06 Homework 0. What are the magnitude and direction of the current in the 8 Ω resister in the figure? Assume the current is moving clockwise. Then use Kirchhoff's second rule: 3.00
More informationCHAPTER 28 ELECTRIC CIRCUITS
CHAPTER 8 ELECTRIC CIRCUITS 1. Sketch a circuit diagram for a circuit that includes a resistor R 1 connected to the positive terminal of a battery, a pair of parallel resistors R and R connected to the
More informationObjectives 200 CHAPTER 4 RESISTANCE
Objectives Explain the differences among conductors, insulators, and semiconductors. Define electrical resistance. Solve problems using resistance, voltage, and current. Describe a material that obeys
More informationEDEXCEL NATIONAL CERTIFICATE/DIPLOMA UNIT 5  ELECTRICAL AND ELECTRONIC PRINCIPLES NQF LEVEL 3 OUTCOME 1  D.C. CIRCUITS
EDEXCEL NATIONAL CERTIFICATE/DIPLOMA UNIT 5  ELECTRICAL AND ELECTRONIC PRINCIPLES NQF LEVEL 3 OUTCOME  D.C. CIRCUITS Be able to use circuit theory to determine voltage, current and resistance in direct
More informationPhysics II Exam 2 Review
Physics II Exam 2 Review Christopher Lane 1,2 Justin Lucas 1,3 Julia Bielaski 1,2 1 Department Physics, Clarkson University 2 Department Mathematics, Clarkson University 3 Department Electrical and Computer
More informationChapter 13: Electric Circuits
Chapter 13: Electric Circuits 1. A household circuit rated at 120 Volts is protected by a fuse rated at 15 amps. What is the maximum number of 100 watt light bulbs which can be lit simultaneously in parallel
More informationPractice Problems  Chapter 33 Alternating Current Circuits
Multiple Choice Practice Problems  Chapter 33 Alternating Current Circuits 4. A highvoltage powerline operates at 500 000 Vrms and carries an rms current of 500 A. If the resistance of the cable is
More informationExperiment #6, Series and Parallel Circuits, Kirchhoff s Laws
Physics 182 Spring 2013 Experiment #6 1 Experiment #6, Series and Parallel Circuits, Kirchhoff s Laws 1 Purpose Our purpose is to explore and validate Kirchhoff s laws as a way to better understanding
More informationSeries and Parallel Circuits
Series and Parallel Circuits Components in a circuit can be connected in series or parallel. A series arrangement of components is where they are inline with each other, i.e. connected endtoend. A parallel
More informationEMF and Terminal Voltage Resistors in Series and Parallel Kirchhoff s Rules EMFs in Series and Parallel; Charging a Battery Circuits with Capacitors
Chapter 19 DC Electrical Circuits Topics in Chapter 19 EMF and Terminal Voltage Resistors in Series and Parallel Kirchhoff s Rules EMFs in Series and Parallel; Charging a Battery Circuits with Capacitors
More informationExam 1 Solutions. PHY2054 Fall 2014. Prof. Paul Avery Prof. Andrey Korytov Sep. 26, 2014
Exam 1 Solutions Prof. Paul Avery Prof. Andrey Korytov Sep. 26, 2014 1. Charges are arranged on an equilateral triangle of side 5 cm as shown in the diagram. Given that q 1 = 5 µc and q 2 = q 3 = 2 µc
More informationΣ I in = Σ I out E = IR 1 + IR 2 FXA 2008 KIRCHHOFF S LAWS 1. Candidates should be able to : LAW 1 (K1)
UNT G482 Module 3 2.3.1 Series & Parallel Circuits Candidates should be able to : KRCHHOFF S LAWS 1 LAW 1 (K1) State Kirchhoff s second law and appreciate that it is a consequence of conservation of energy.
More information1. The diagram below represents magnetic lines of force within a region of space.
1. The diagram below represents magnetic lines of force within a region of space. 4. In which diagram below is the magnetic flux density at point P greatest? (1) (3) (2) (4) The magnetic field is strongest
More informationCh. 20 Electric Circuits
Ch. 0 Electric Circuits 0. Electromotive Force Every electronic device depends on circuits. Electrical energy is transferred from a power source, such as a battery, to a device, say a light bulb. Conducting
More informationPhysics 2212 GH Quiz #4 Solutions Spring 2015
Physics 1 GH Quiz #4 Solutions Spring 15 Fundamental Charge e = 1.6 1 19 C Mass of an Electron m e = 9.19 1 31 kg Coulomb constant K = 8.988 1 9 N m /C Vacuum Permittivity ϵ = 8.854 1 1 C /N m Earth s
More informationReview Questions PHYS 2426 Exam 2
Review Questions PHYS 2426 Exam 2 1. If 4.7 x 10 16 electrons pass a particular point in a wire every second, what is the current in the wire? A) 4.7 ma B) 7.5 A C) 2.9 A D) 7.5 ma E) 0.29 A Ans: D 2.
More informationPHYSICS 111 LABORATORY Experiment #3 Current, Voltage and Resistance in Series and Parallel Circuits
PHYSCS 111 LABORATORY Experiment #3 Current, Voltage and Resistance in Series and Parallel Circuits This experiment is designed to investigate the relationship between current and potential in simple series
More informationFall 12 PHY 122 Homework Solutions #10
Fall 12 PHY 122 Homework Solutions #10 HW10: Ch.30 Q5, 8, 15,17, 19 P 1, 3, 9, 18, 34, 36, 42, 51, 66 Chapter 30 Question 5 If you are given a fixed length of wire, how would you shape it to obtain the
More informationChapter 19 DC Circuits
Lecture PowerPoints Chapter 19 Physics: Principles with Applications, 6 th edition Giancoli Chapter 19 DC Circuits 2005 Pearson Prentice Hall This work is protected by United States copyright laws and
More informationElectricity ReviewSheet
Name: ate: 1. The unit of electrical charge in the MKS system is the. volt. ampere. coulomb. mho 2. Which sketch best represents the charge distribution around a neutral electroscope when a positively
More informationHomework #11 20311721 Physics 2 for Students of Mechanical Engineering
Homework #11 20311721 Physics 2 for Students of Mechanical Engineering 2. A circular coil has a 10.3 cm radius and consists of 34 closely wound turns of wire. An externally produced magnetic field of
More informationLast Name: First Name: Physics 102 Spring 2006: Exam #2 MultipleChoice Questions 1. A charged particle, q, is moving with speed v perpendicular to a uniform magnetic field. A second identical charged
More informationElectrical Circuit Calculations
Electrical Circuit Calculations Series Circuits Many circuits have more than one conversion device in them (i.e. toaster. heater. lamps etc.) and some have more than one source of electrical energy. If
More informationElectronicsLab2.nb. Electronics Lab #2. Simple Series and Parallel Circuits
Electronics Lab #2 Simple Series and Parallel Circuits The definitions of series and parallel circuits will be given in this lab. Also, measurements in very simple series and parallel circuits will be
More informationExam 2 Solutions. PHY2054 Spring Prof. P. Kumar Prof. P. Avery March 5, 2008
Prof. P. Kumar Prof. P. Avery March 5, 008 Exam Solutions 1. Two cylindrical resistors are made of the same material and have the same resistance. The resistors, R 1 and R, have different radii, r 1 and
More informationExperiment #5, Series and Parallel Circuits, Kirchhoff s Laws
Physics 182 Summer 2013 Experiment #5 1 Experiment #5, Series and Parallel Circuits, Kirchhoff s Laws 1 Purpose Our purpose is to explore and validate Kirchhoff s laws as a way to better understanding
More informationPHYS 202 (DDE) Solved problems in electricity 1
PHYS 202 (DDE) Solved problems in electricity 1 1. Common static electricity involves charges ranging from nanocoulombs to microcoulombs. How many electrons are needed to form a charge of 2.00 nc? How
More informationCLASS TEST GRADE 11. PHYSICAL SCIENCES: PHYSICS Test 3: Electricity and magnetism
CLASS TEST GRADE 11 PHYSICAL SCIENCES: PHYSICS Test 3: Electricity and magnetism MARKS: 45 TIME: 1 hour INSTRUCTIONS AND INFORMATION 1. Answer ALL the questions. 2. You may use nonprogrammable calculators.
More informationQ1. (a) The diagram shows the voltagecurrent graphs for three different electrical components.
Q. (a) The diagram shows the voltagecurrent graphs for three different electrical components. Which one of the components A, B or C could be a 3 volt filament lamp? Explain the reason for your choice...................
More information1) Magnetic field lines come out of the south pole of a magnet and enter at the north pole.
Exam Name 1) Magnetic field lines come out of the south pole of a magnet and enter at the north pole. 2) Which of the following statements is correct? A) Earth's north pole is magnetic north. B) The north
More informationResistors. Some substances are insulators. A battery will not make detectible current flow through them.
Resistors Some substances are insulators. A battery will not make detectible current flow through them. Many substances (lead, iron, graphite, etc.) will let current flow. For most substances that are
More informationAnswer, Key Homework 11 David McIntyre 1 1 A
nswer, Key Homework 11 avid Mcntyre 1 This printout should have 36 questions, check that it is complete. Multiplechoice questions may continue on the next column or page: find all choices before making
More informationStudent Content Brief Advanced Level
Student Content Brief Advanced Level Electric Circuits Background Information There are a variety of forces acting on the body of the Sea Perch. One important force is pushing electrons through the wires
More informationExtra Questions  1. 1. What current will flow in a 20Ω resistor when it is connected to a 50V supply? a) 0.4A b) 1.6A c) 2.5A
Extra Questions  1 1. What current will flow in a 20Ω resistor when it is connected to a 50V supply? a) 0.4A b) 1.6A c) 2.5A 2. A current of 500mA flows in a resistance of 12Ω. What power is dissipated
More informationPeople s Physics Book
The Big Ideas: The name electric current is given to the phenomenon that occurs when an electric field moves down a wire at close to the speed of light. Voltage is the electrical energy density (energy
More informationCHAPTER 19: DC Circuits. Answers to Questions
HAPT 9: D ircuits Answers to Questions. The birds are safe because they are not grounded. Both of their legs are essentially at the same voltage (the only difference being due to the small resistance of
More informationStoring And Releasing Charge In A Circuit
Storing And Releasing Charge In A Circuit Topic The characteristics of capacitors Introduction A capacitor is a device that can retain and release an electric charge, and is used in many circuits. There
More information45. The peak value of an alternating current in a 1500W device is 5.4 A. What is the rms voltage across?
PHYS Practice Problems hapters 8 hapter 8. 45. The peak value of an alternating current in a 5W device is 5.4 A. What is the rms voltage across? The power and current can be used to find the peak voltage,
More informationOhm's Law and Circuits
2. Conductance, Insulators and Resistance A. A conductor in electricity is a material that allows electrons to flow through it easily. Metals, in general, are good conductors. Why? The property of conductance
More informationCURRENT ELECTRICITY  I
CURRNT LCTRCTY  1. lectric Current 2. Conventional Current 3. Drift elocity of electrons and current 4. Current Density 5. Ohm s Law 6. Resistance, Resistivity, Conductance & Conductivity 7. Temperature
More informationResistors in Series and Parallel Circuits
69 Resistors in Series and Parallel Circuits E&M: Series and parallel circuits Equipment List DataStudio file: Not Required Qty s Part Numbers 1 C/DC Electronics Lab EM8656 2 D cell 1.5 volt Introduction
More information104 Practice Exam 23/21/02
104 Practice Exam 23/21/02 1. Two electrons are located in a region of space where the magnetic field is zero. Electron A is at rest; and electron B is moving westward with a constant velocity. A nonzero
More information1) ASSOCIATE ELEMENTARY PARTICLES WITH THEIR ELECTRICAL CHARGE
Name Date STUDY GUIDE CHAPTER 5 ELECTRICITY AND MAGNETISM 1) ASSOCIATE ELEMENTARY PARTICLES WITH THEIR ELECTRICAL CHARGE Scientists now know that an atom is composed of even smaller particles of matter:
More informationKirchhoff s Voltage Law and RC Circuits
Kirchhoff s oltage Law and RC Circuits Apparatus 2 1.5 batteries 2 battery holders DC Power Supply 1 multimeter 1 capacitance meter 2 voltage probes 1 long bulb and 1 round bulb 2 sockets 1 set of alligator
More informationPHYSICS REFERENCE STUDY MATERIAL. for. Summative Assessment I CLASS X 2014 15 CHAPTER WISE CONCEPTS, FORMULAS AND NUMERICALS INLCUDING HOTS PROBLEMS
PHYSICS REFERENCE STUDY MATERIAL for Summative Assessment I CLASS X 2014 15 CHAPTER WISE CONCEPTS, FORMULAS AND NUMERICALS INLCUDING HOTS PROBLEMS Prepared by M. S. KUMARSWAMY, TGT(MATHS) M. Sc. Gold
More informationTutorial 12 Solutions
PHYS000 Tutorial 2 solutions Tutorial 2 Solutions. Two resistors, of 00 Ω and 200 Ω, are connected in series to a 6.0 V DC power supply. (a) Draw a circuit diagram. 6 V 00 Ω 200 Ω (b) What is the total
More informationThe diagram shows a negatively charged plastic rod held near to a thin stream of water. The water is attracted towards the rod.
Current electricity exam qs C grade Madeley High School Q.(a) The diagram shows a negatively charged plastic rod held near to a thin stream of water. The water is attracted towards the rod. Which one of
More informationInductors in AC Circuits
Inductors in AC Circuits Name Section Resistors, inductors, and capacitors all have the effect of modifying the size of the current in an AC circuit and the time at which the current reaches its maximum
More information( )( 10!12 ( 0.01) 2 2 = 624 ( ) Exam 1 Solutions. Phy 2049 Fall 2011
Phy 49 Fall 11 Solutions 1. Three charges form an equilateral triangle of side length d = 1 cm. The top charge is q =  4 μc, while the bottom two are q1 = q = +1 μc. What is the magnitude of the net force
More information3. What atom s particle moves through a conductor material? 4. Which are the electric components of an elemental electric circuit?
1. What is electricity? 2. Write down the name of the atom s particles. 3. What atom s particle moves through a conductor material? 4. Which are the electric components of an elemental electric circuit?
More information2 A bank account for electricity II: flows and taxes
PHYS 189 Lecture problems outline Feb 3, 2014 Resistors and Circuits Having introduced capacitors, we now expand our focus to another very important component of a circuit resistors. This entails more
More informationSTUDY MATERIAL FOR CLASS 10+2  Physics CURRENT ELECTRICITY. The flow of electric charges in a particular direction constitutes electric current.
Chapter : 3 Current Electricity Current Electricity The branch of Physics which deals with the study of electric charges in motion is called current electricity. Electric current The flow of electric charges
More informationChapter 21 Electric Current and DirectCurrent Circuit
Chapter 2 Electric Current and DirectCurrent Circuit Outline 2 Electric Current 22 Resistance and Ohm s Law 23 Energy and Power in Electric Circuit 24 Resistance in Series and Parallel 25 Kirchhoff
More informationCURRENT ELECTRICITY INTRODUCTION TO RESISTANCE, CAPACITANCE AND INDUCTANCE
CURRENT ELECTRICITY INTRODUCTION TO RESI STANCE, CAPACITANCE AND INDUCTANCE P R E A M B L E This problem is adapted from an online knowledge enhancement module for a PGCE programme. It is used to cover
More informationObjectives. Electric Current
Objectives Define electrical current as a rate. Describe what is measured by ammeters and voltmeters. Explain how to connect an ammeter and a voltmeter in an electrical circuit. Explain why electrons travel
More informationChapter 19. Electric Circuits
Chapter 9 Electric Circuits Series Wiring There are many circuits in which more than one device is connected to a voltage source. Series wiring means that the devices are connected in such a way that there
More informationExperiment 3 ~ Ohm's Law, Measurement of Voltage, Current and Resistance
Experiment 3 ~ Ohm's Law, Measurement of Voltage, Current and Resistance Objective: In this experiment you will learn to use the multimeter to measure voltage, current and resistance. Equipment: Bread
More informationElectrical Fundamentals Module 3: Parallel Circuits
Electrical Fundamentals Module 3: Parallel Circuits PREPARED BY IAT Curriculum Unit August 2008 Institute of Applied Technology, 2008 ATE310 Electrical Fundamentals 2 Module 3 Parallel Circuits Module
More informationAn inductance L and a resistance R are connected to a source of emf as shown. When switch S 1 is closed, a current begins to flow. The final value of the current is A. directly proportional to RL. B. directly
More informationCircuit symbol. Each of the cells has a potential difference of 1.5 volts. Figure 1. Use the correct answer from the box to complete the sentence.
Q.(a) Draw one line from each circuit symbol to its correct name. Circuit symbol Name Diode Lightdependent resistor (LDR) Lamp Lightemitting diode (LED) (3) Figure shows three circuits. The resistors
More informationScience AS90191 Describe Aspects of Physics.
Circuits and components Science AS90191 Describe Aspects of Physics. An electric current is the movement of electrons (negatively charged particles). A circuit is made up of components connected together
More informationSeries and Parallel Circuits
Direct Current (DC) Direct current (DC) is the unidirectional flow of electric charge. The term DC is used to refer to power systems that use refer to the constant (not changing with time), mean (average)
More informationTristan s Guide to: Solving Parallel Circuits. Version: 1.0 Written in 2006. Written By: Tristan Miller Tristan@CatherineNorth.com
Tristan s Guide to: Solving Parallel Circuits. Version: 1.0 Written in 2006 Written By: Tristan Miller Tristan@CatherineNorth.com Parallel Circuits. Parallel Circuits are a little bit more complicated
More informationPHYSICS LAB. Capacitor. Date: GRADE: PHYSICS DEPARTMENT JAMES MADISON UNIVERSITY. Revision November 2002. Capacitor 21
PHYSICS LAB Capacitor Printed Names: Signatures: Date: Lab Section: Instructor: GRADE: PHYSICS DEPARTMENT JAMES MADISON UNIVERSITY Revision November 2002 Capacitor 21 Blank page Capacitor 22 CHARGING AND
More informationSolution Derivations for Capa #11
Solution Derivations for Capa #11 Caution: The symbol E is used interchangeably for energy and EMF. 1) DATA: V b = 5.0 V, = 155 Ω, L = 8.400 10 2 H. In the diagram above, what is the voltage across the
More information1 of 7 3/23/2010 2:45 PM
1 of 7 3/23/2010 2:45 PM Chapter 30 Homework Due: 8:00am on Tuesday, March 23, 2010 Note: To understand how points are awarded, read your instructor's Grading Policy. [Return to Standard Assignment View]
More informationElectricity CHAPTER 12 12.1 ELECTRIC CURRENT AND CIRCUIT
CHAPTER 12 Electricity Electricity has an important place in modern society. It is a controllable and convenient form of energy for a variety of uses in homes, schools, hospitals, industries and so on.
More informationProfs. A. Petkova, A. Rinzler, S. Hershfield. Exam 2 Solution
PHY2049 Fall 2009 Profs. A. Petkova, A. Rinzler, S. Hershfield Exam 2 Solution 1. Three capacitor networks labeled A, B & C are shown in the figure with the individual capacitor values labeled (all units
More informationCircuits and Resistivity
Circuits and Resistivity Look for knowledge not in books but in things themselves. W. Gilbert OBJECTIVES To learn the use of several types of electrical measuring instruments in DC circuits. To observe
More informationSchematic diagrams depict the construction of a circuit Uses symbols to represent specific circuit elements Documents how elements are connected so
Circuits Schematic diagrams depict the construction of a circuit Uses symbols to represent specific circuit elements Documents how elements are connected so that anyone reading diagram can understand the
More informationELECTRICITY: CIRCUIT QUESTIONS
ELECTRICITY: CIRCUIT QUESTIONS Resistors in a DC circuit (2014;2) Sandra is investigating electrical circuits in the lab. She connects various resistors in combination. The current drawn from the supply
More informationPhysics 9 Fall 2009 Homework 6  Solutions
. Chapter 32  Exercise 8. Physics 9 Fall 29 Homework 6  s How much power is dissipated by each resistor in the figure? First, let s figure out the current in the circuit. Since the two resistors are
More informationCircuits. PHY2049: Chapter 27 1
Circuits PHY2049: Chapter 27 1 What You Already Know Nature of current Current density Drift speed and current Ohm s law Conductivity and resistivity Calculating resistance from resistivity Power in electric
More informationKirchhoff's Rules and Applying Them
[ Assignment View ] [ Eðlisfræði 2, vor 2007 26. DC Circuits Assignment is due at 2:00am on Wednesday, February 21, 2007 Credit for problems submitted late will decrease to 0% after the deadline has passed.
More informationTime dependent circuits  The RC circuit
Time dependent circuits  The circuit Example 1 Charging a Capacitor Up until now we have assumed that the emfs and resistances are constant in time, so that all potentials, currents and powers are constant
More informationLab 5 RC Circuits: Charge Changing in Time Observing the way capacitors in RC circuits charge and discharge.
Print Your Name Lab 5 RC Circuits: Charge Changing in Time Observing the way capacitors in RC circuits charge and discharge. Print Your Partners' Names Instructions October 15, 2015October 13, 2015 Read
More informationVectors and Phasors. A supplement for students taking BTEC National, Unit 5, Electrical and Electronic Principles. Owen Bishop
Vectors and phasors Vectors and Phasors A supplement for students taking BTEC National, Unit 5, Electrical and Electronic Principles Owen Bishop Copyrught 2007, Owen Bishop 1 page 1 Electronics Circuits
More informationBatteries, conductors and resistors
Batteries, conductors and resistors Lecture 3 1 How do we generate electric fields where does the energy come from? The e.m.f. generator uses some physical principle to create an excess of electrons at
More informationObjectives. to understand how to use a voltmeter to measure voltage
UNIT 10 MEASUREMENTS OF VOLTAGE (from Lillian C. McDermott and the Physics Education Group, Physics by Inquiry Volume II, John Wiley and Sons, NY, 1996) Objectives to understand how to use a voltmeter
More informationCapacitance. Apparatus: RC (ResistorCapacitor) circuit box, voltmeter, power supply, cables
apacitance Objective: To observe the behavior of a capacitor charging and discharging through a resistor; to determine the effective capacitance when capacitors are connected in series or parallel. Apparatus:
More informationExperiment NO.3 Series and parallel connection
Experiment NO.3 Series and parallel connection Object To study the properties of series and parallel connection. Apparatus 1. DC circuit training system 2. Set of wires. 3. DC Power supply 4. Digital A.V.O.
More informationStudent Exploration: Circuits
Name: Date: Student Exploration: Circuits Vocabulary: ammeter, circuit, current, ohmmeter, Ohm s law, parallel circuit, resistance, resistor, series circuit, voltage Prior Knowledge Questions (Do these
More informationCAPACITIVE REACTANCE. We have already discussed the operation of a capacitor in a DC circuit, however let's just go over the main principles again.
Reading 13 Ron Bertrand VK2DQ http://www.radioelectronicschool.com CAPACITOR IN A DC CIRCUIT CAPACITIVE REACTANCE We have already discussed the operation of a capacitor in a DC circuit, however let's just
More informationElectrical Measurements
Electrical Measurements Experimental Objective The objective of this experiment is to become familiar with some of the electrical instruments. You will gain experience by wiring a simple electrical circuit
More information