DC Circuits: Ch 19. Resistors in Series 6/1/2016

Save this PDF as:
 WORD  PNG  TXT  JPG

Size: px
Start display at page:

Download "DC Circuits: Ch 19. Resistors in Series 6/1/2016"

Transcription

1 DC Circuits: Ch 19 Voltage Starts out at highest point at + end of battery Voltage drops across lightbulbs and other sources of resistance. Voltage increases again at battery. I The following circuit uses a 1.5 V battery and has a 15 W lightbulb. a. Calculate the current in the circuit b. Calculate the voltage drop across the lightbulb. c. Sketch a graph of voltage vs. path (battery, top wire, resistor, bottom wire) + - Voltage highest Voltage zero Resistors in Series Same current (I) passes through all resistors (bulbs) All bulbs are equally bright (energy loss, not current loss) Voltage drop across each resistor (V 1,V 2, V 3 ) 1

2 V = V 1 + V 2 + V 3 V = IR 1 + IR 2 + IR 3 V = I(R 1 + R 2 + R 3 ) R eq = R 1 + R 2 + R 3 V = IR eq Resistors in Parallel Current splits at the junction Same Voltage across all resistors I = I 1 + I 2 + I 3 I 1 = V R 1 I = V R eq Calculate the equivalent resistance of two 200W resistors placed in: a. Series b. Parallel 1 = R eq R 1 R 2 R 3 2

3 Calculate the equivalent resistance for the circuit below. Which combination of auto headlights will produce the brightest bulbs? Assume all bulbs have a resistance of R. For the Bulbs in Series: R eq = R + R = 2R For the Bulbs in Parallel 1 = R eq R R 1 = 2 R eq R R eq = R/2 The bulbs in parallel have less resistance and will be brighter What current flows through each resistor in the following circuit? (R = 100 W) A Calculate the current through this circuit, and the voltage drop across each resistor. V ab = (0.0174A)(400W) V ab = 6.96 V V bc = (0.0174A)(290W) V bc = 5.04 V R eq = 690 W I = A 3

4 What current flows through each of the resistors in this circuit? (Both are 100 W) What current will flow through the circuit shown? (I =0.48 A, I 1 =I 2 =0.24 A) R eq = 400 W W R eq = 690 W V = IR I = V/R I = 12.0 V/690 W I = A or 17 ma What current is flowing through just the 500 W resistor? First we find the voltage drop across the first resistor: V = IR = (0.017 A)(400 W) V = 6.8 V The voltage through the resistors in parallel will be: 12.0 V 6.8 V = 5.2 V Calculate the equivalent resistance in the following circuit. To find the current across the 500 W resistor: V = IR I = V/R I = 5.2 V/500 W = A = 10 ma 4

5 Which bulb will be the brightest in this arrangement (most current)? Bulb C (current gets split running through A and B) What happens when the switch is opened? C and B will have the same brightness (I is constant in a series circuit) What resistance would be present between points A and B? (ANS: 41/15 R) EMF and Terminal Voltage Batteries - source of emf (Electromotive Force), E (battery rating) All batteries have some internal resistance r A 12-V battery has an internal resistance of 0.1 W. If 10 Amps flow from the battery, what is the terminal voltage? V ab = E Ir V ab = terminal(useful)voltage E = battery rating r = internal resistance V ab = 11 V 5

6 Calculate the current in the following circuit. R eq = 6 W W R eq = 8.7 W 1/R eq = 1/10 W + 1/8.7 W R eq = 4.8 W Everything is now in series R eq = 4.8 W W W R eq = 10.3 W V = IR I = V/R I = 9.0 V/10.3 W I = 0.87 A Now calculate the terminal(useful)voltage. V = E Ir V = 9.0 V (0.87 A)(0.50 W) V = 8.6 V Grounded Wire is run to the ground Houses have a ground wire at main circuit box Does not affect circuit behavior normally Provides path for electricity to flow in emergency 6

7 Kirchhoff s Rules 1. Junction Rule - The sum of the currents entering a junction must equal the sum of currents leaving 2. Loop Rule - The sum of the changes in potential around any closed path = 0 Kirchhoff Conventions The loop current is not a current. Just a direction that you follow around the loop. Kirchhoff Conventions Kirchhoff s Rule Ex 1 I 1 = I 2 + I 3 Junction Rule 7

8 Loop Rule Main Loop 6V (I 1 )(4W) (I 3 )(9W) = 0 Side Loop (-I 2 )(5W) + (I 3 )(9W) = 0 I 1 = I 2 + I 3 Eqn 3 6V (I 1 )(4W) (I 3 )(9W) = 0 Eqn 2 (-I 2 )(5W) + (I 3 )(9W) = 0 Eqn 3 Solve Eqn 1 (-I 2 )(5W) + (I 3 )(9W) = 0 (I 3 )(9W) = (I 2 )(5W) I 3 = 5/9 I 2 Substitution into Eqn 2 6V (I 2 + I 3 )(4W) (I 3 )(9W) = 0 6 4I 2-4I 3-9I 3 = 0 6 4I 2-13I 3 = 0 I 3 = 5/9 I 2 (from last slide) 6 4I 2-13(5/9 I 2 ) = 0 6 = 101/9 I 2 I 2 = 0.53 A I 3 = 5/9 I 2 = 0.29 A I 1 = I 2 + I 3 = 0.53 A A = 0.82 A Kirchhoff s Rule Ex 2 I 1 = I 2 + I 3 8

9 Loop Rule Main Loop 9V (I 3 )(10W) (I 1 )(5W) = 0 Side Loop (-I 2 )(5W) + (I 3 )(10W) = 0 (-I 2 )(5W) + (I 3 )(10W) = 0 (I 2 )(5W) = (I 3 )(10W) I 2 = 2I 3 I 3 = 9/25 = 0.36 A I 2 = 2I 3 = 2(0.36 A) = 0.72 A I 1 = I 2 + I 3 = 0.36A A = 1.08 A 9V (I 3 )(10W) (I 1 )(5W) = 0 9V (I 3 )(10W) (I 2 + I 3 )(5W) = I 3 5I 2 5I 3 = I 3 5I 2 = I 3 5(2I 3 ) = I 3 = 0 I 3 = 9/25 = 0.36 A Calculate all the currents in the following circuit. A = A B = 0.26 A C = A Calculate the currents in the following circuit. 2 Amps, 3 Amps, -1 Amps 9

10 Bottom Loop (clockwise) 10V (6W)I 1 (2W)I 3 = 0 Top Loop (clockwise) -14V +(6W)I 1 10 V -(4W)I 2 = 0 Work with Bottom Loop 10V (6W)I 1 (2W)I 3 = 0 I 1 + I 2 = I I 1 2(I 1 + I 2 ) = I 1 2I 1-2I 2 = I 1-2I 2 = 0 10 = 8I 1 + 2I 2 5 = 4I 1 + I 2 I 2 = 5-4I 1 Working with Top Loop -14V +(6W)I 1 10 V -(4W)I 2 = 0 24 = 6I 1-4I 2 12 = 3I 1-2I 2 12 = 3I 1-2(5-4I 1 ) 22 = 11I 1 I 1 = 22/11 = 2.0 Amps I 2 = 5-4I 1 I 2 = 5 4(2) = -3.0 Amps I 1 + I 2 = I 3 I 3 = -1.0 A Calculate all the currents in the following circuit. A = 1.56A B = A C = 1.04 A Batteries in Series If + to -, voltages add (top drawing) If + to +, voltages subtract (middle drawing = 8V, used to charge the 12V battery as in a car engine) I 1 = A I 2 = 2.6 A I 3 = 1.73 A Extra Kirchhoff Problems Batteries in Parallel Provide large current when needed (Same voltage) 10

11 Calculate I (0.5 Amps) a. Calculate the equivalent resistance. (2.26 W) b. Calculate the current in the upper and lower wires. (3.98 A) c. Calculate I 1, I 2, and I 3 (0.60 A, 2.25 A, 1.13 A) d. Sketch a graph showing the voltage through the circuit starting at the battery. Capacitors in Parallel I 1 = A I 2 = A 1 3 = 0.50 A Voltage is constant in parallel Q = CV Q = C 1 V + C 2 V Q = C eq V C eq = C 1 + C 2 + C 3 + C 1 C 2 (like using a larger plate) I 1 = A I 2 = A 1 3 = 0.50 A Capacitors in Series Charge is constant in series 1 = C eq C 1 C 2 C 3 Eq. Capacitance Ex. 1 Determine the equivalent capacitance for the circuit below if each capacitor is 5 mf. C 1 C 3 C 1 C 2 C 3 C 2 +Q -Q +Q -Q +Q -Q 11

12 Parallel first: Given the following setup: C eq = C 1 + C 2 C eq = 5mF + 5mF = 10 mf Series: 1 = = 3/10 C eq 10 5 Ceq = 3.33 mf a. Calculate the charge on each capacitor (52.8 mc, 28.8 mc) Given the circuit below: a. Calculate the equivalent capacitance b. Calculate the charge across each capacitor c. Calculate the voltage on each capacitor (HINT: Combine them for part a, and then split them back up for b and c) Parallel capacitors C eq = 5 mf +1 mf = 6 mf Now both are series 1/ C eq = 1/6 + 1/3 C eq = 2 mf Q = CV = (2 mf)(12 V) = 24 mc For 3 mf capacitor Q = CV V = Q/C = 24 mc/3 mf = 8 V For Combined Parallel Capacitors (same voltage) V = Q/C = 24 mc/6 mf = 4 V For 5 mf Capacitor Q = CV = (5 mf)(4 V) = 20 mc For 1 mf Capacitor Q = CV = (1 mf)(4 V) = 4 mc 12

13 Given the following setup: a. Calculate the equivalent capacitance. (2.0 mf) b. Calculate the total charge that leaves the battery. (8.0 mc) c. Calculate the charge and voltage on each capacitor. (Q 1 = 8.0 mc, 2.7 V: Q 2 = Q 3 = 4.0 mc, 1.3 V) Given the following setup: a. Calculate the equivalent capacitance. (0.609 mf) b. Calculate the total charge that leaves the battery. (14.6 mc) c. Calculate the charge and voltage on each capacitor. (Q 1 = 14.6 mc, 14.6 V, Q 2 = 14.6 mc, 7.30 V, Q 3 = 6.26 mc, 2.09 V, Q 4 = 8.36 mc, 2.09 V ) a. Calculate the equivalent capacitance. (18 mf) b. Calculate the total charge that leaves the battery. (162 mc) c. Calculate the charge and voltage on each capacitor. (Q 1 = 45 mc, 9 V, Q 2 = 90 mc, 9 V, Q 3 = 27 mc, 9 V) a. Equivalent capacitance. (1.58 mf) b. Calculate the total charge that leaves the battery. (14.2 mc) c. Calculate the charge and voltage on each capacitor. (Q 1 = 14.2 mc, 2.84 V, Q 2 = 14.2 mc, 1.42 V, Q 3 = 14.2 mc, 4.73 V) a. Equivalent capacitance. (7.31 mf) b. Total charge that leaves the battery. (43.8 mc) c. Calculate the charge and voltage on each capacitor. (Q 1 = 30 mc, 6 V, Q 2 = 13.8 mc, 1.38 V, Q 3 = 13.8 mc, 4.6 V) a. Equivalent capacitance. (6.41 mf) b. Calculate the total charge that leaves the battery. (22.4 mc) c. Calculate the charge and voltage on each capacitor. (Q 1 = 22.4 mc, 2 V, Q 2 = 15 mc, 1.5 V, Q 3 = 7.5 mc, 1.5 V) 13

14 RC Circuits Capacitors store energy (flash in a camera) Resistors control how fast that energy is released Car lights that dim after you shut them off Camera flashes Difibralator DV c + DV r = 0 Q - IR = 0 (Divide by R) C Q - I = 0 RC (I = -dq/dt) Q + dq = 0 RC dt = time constant (time to reach 63% of full voltage) = RC A versatile relationship Charging the Capacitor (for capacitor) V = V o (1-e -t/rc ) Q = Q o (1-e -t/rc ) I = I o e -t/rc Discharging the Capacitor V = V o e -t/rc Q = Q o e -t/rc I = I o e -t/rc RC Circuits: Ex 1 What is the time constant for an RC circuit of resistance 200 kw and capacitance of 3.0 mf? = (200,000 W)(3.0 X 10-6 F) = 0.60 s (lower resistance will cause the capacitor to charge more quickly) 14

15 RC Circuits: Ex 2 What will happen to the bulb (resistor) in the circuit below when the switch is closed (like a car door)? Answer: Bulb will glow brightly initially, then dim as capacitor nears full charge. RC Circuits: Ex 3 An uncharged RC circuit has a 12 V battery, a 5.0 mf capacitor and a 800 kw resistor. Calculate the time constant. = RC = (5.0 X 10-6 F)(800,000 W) = 4.0 s What is the maximum charge on the capacitor? Q = CV Q = (5.0 X 10-6 F)(12 V) Q = 6 X 10-5 C or 60 mc What is the voltage and charge on the capacitor after 1 time constant (when discharging)? Calculate: a. Time constant (6 ms) b. Maximum charge on the capacitor (3.6 mc) c. Maximum current (0.60 ma) d. Time to reach 99% of maximum charge (28 ms) e. Current when charge = ½ Q max (0.300 ma) f. The charge when the current is 20% of the maximum value. (2.9 mc) V = V o e -t/rc Discharging the RC Circuit 15

16 An RC circuit has a charged capacitor C = 35 mf and a resistance of 120W. How much time will elapse until the voltage falls to 10 percent of its original (maximum) value? V = V o e -t/rc 0.10V o =V o e -t/rc 0.10 =e -t/rc ln(0.10) = ln(e -t/rc ) -2.3 = -t/rc 2.3 = t/rc t = 2.3RC t = (2.3)(120W)(35 X 10-6 F) t = s or 9.7 ms If a capacitor is discharged in an RC circuit, how many time constants will it take the voltage to drop to ¼ its maximum value? A fully charged 1.02 mf capacitor is in a circuit with a 20.0 V battery and a resistor. When discharged, the current is observed to decrease to 50% of it s initial value in 40 ms. a. Calculate the charge on the capacitor at t=0 (20.4 mc) b. Calculate the resistance R (57 W) c. Calculate the charge at t = 60 ms (7.3 mc) (t = 1.39RC) The capacitor in the drawing has been fully charged. The switch is quickly moved to position b (camera flash). a. Calculate the initial charge on the capacitor. (9 mc) b. Calculate the charge on the capacitor after 5.0 ms while discharging. (5.5 mc) c. Calculate the voltage after 5.0 ms while discharging. (5.5 V) d. Calculate the current through the resistor after 5.0 ms while discharging. (0.55 A) Meters Galvanometer Can only handle a small current Full-scale Current Sensitivity (I m ) Maximum deflection Ex: Multimeter Car speedometer 16

17 Measuring I and V Measuring Current Anmeter is placed in series Current is constant in series Anmeter (Series) Voltmeter (parallel) Measuring Voltage Voltmeter placed in parallel Voltage constant in parallel circuits Measuring voltage drop across a resistor DC Anmeter Uses Shunt (parallel) resistor Shunt resistor has low resistance Most of current flows through shunt, only a little through Galvanometer I R R = I G r Meters: Ex 1 What size shunt resistor should be used if a galvanometer has a full-scale sensitivity of 50 ma and a resistance of r= 30 W? You want the meter to read a 1.0 A current. Voltage same through both (V=IR) I R R = I g r Since most of the current goes through the shunt I R ~ 1 A I R R = I g r (1 A)(R) = (50 X 10-6 A)(30 W) R = 1.5 X 10-3 W or 1.5 m W Meters: Ex 2 Design an anmeter that can test a 12 A vacuum cleaner if the galvanometer has an internal resistance of 50 W and a full scale deflection of 1 ma. I R R = I g r (12 A)(R) = (1 X 10-3 A)(50 W) R = 4.2 X 10-3 W or 4.2 m W 17

18 DC Voltmeter Resistor in series Large R for resistor (keeps current low in Galvanometer) V = I(R + r) Meters: Ex 3 What resistor should be used in a voltmeter that can read a maximum of 15 V? The galvanometer has an internal resistance of 30W and a full scale deflection of 50 ma. V = I(R + r) 15 V = (50 X 10-6 A)(R + 30W) R + 30W = 15 V 50 X 10-6 A R + 30W = 300,000 W R ~ 300,000 W Meters: Ex 4 Design a voltmeter for a 120 V appliance with and internal galvanometer resistance of 50 W and a current sensitivity of 1 ma. (ANS: R = 120,000 W) 2. Clockwise (12 V. 50 W, (10 mf and 100 W parallel)) 4. a) 0.10 A b) Graph page a) 5 V, 10 V b) Graph page W, 2.9 W X 10 6 J W % 20. R/ W W W V, 5 V, 0 V, -2 V ms ms K W 36. A> D = E > B = C m W W W and 60 V V A, 2.0 A, 15 V 56.a) 8 Amps (8 V ab ) b) 9 Amps (0 V ab ) 58. a) R =0.505 W b) R eq = W 62.Resistor(W) (V) Current (A) (bottom) (right)

19 19

20 I 2 = A I 1 = 0.54 A I 3 = A 20

21 21

22 22

Physics 9 Fall 2009 Homework 6 - Solutions

Physics 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 information

EMF and Terminal Voltage Resistors in Series and Parallel Kirchhoff s Rules EMFs in Series and Parallel; Charging a Battery Circuits with Capacitors

EMF 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 information

The 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

The 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 information

Circuits. The light bulbs in the circuits below are identical. Which configuration produces more light? (a) circuit I (b) circuit II (c) both the same

Circuits. The light bulbs in the circuits below are identical. Which configuration produces more light? (a) circuit I (b) circuit II (c) both the same Circuits The light bulbs in the circuits below are identical. Which configuration produces more light? (a) circuit I (b) circuit II (c) both the same Circuit II has ½ current of each branch of circuit

More information

Chapter 19 DC Circuits

Chapter 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 information

Time dependent circuits - The RC circuit

Time 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 information

Chapter 7 Direct-Current Circuits

Chapter 7 Direct-Current Circuits Chapter 7 Direct-Current Circuits 7. Introduction...7-7. Electromotive Force...7-3 7.3 Resistors in Series and in Parallel...7-5 7.4 Kirchhoff s Circuit Rules...7-7 7.5 Voltage-Current Measurements...7-9

More information

Recitation 6 Chapter 21

Recitation 6 Chapter 21 Recitation 6 hapter 21 Problem 35. Determine the current in each branch of the circuit shown in Figure P21.35. 3. Ω 5. Ω 1. Ω 8. Ω 1. Ω ɛ 2 4 12 Let be the current on the left branch (going down), be the

More information

CHAPTER 28 ELECTRIC CIRCUITS

CHAPTER 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 information

Circuits. PHY2049: Chapter 27 1

Circuits. 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 information

= (0.400 A) (4.80 V) = 1.92 W = (0.400 A) (7.20 V) = 2.88 W

= (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 information

FREQUENTLY ASKED QUESTIONS October 2, 2012

FREQUENTLY ASKED QUESTIONS October 2, 2012 FREQUENTLY ASKED QUESTIONS October 2, 2012 Content Questions Why do batteries require resistors? Well, I don t know if they require resistors, but if you connect a battery to any circuit, there will always

More information

E X P E R I M E N T 7

E X P E R I M E N T 7 E X P E R I M E N T 7 The RC Circuit Produced by the Physics Staff at Collin College Copyright Collin College Physics Department. All Rights Reserved. University Physics II, Exp 7: The RC Circuit Page

More information

CHAPTER 19: DC Circuits. Answers to Questions

CHAPTER 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 information

Chapter 27 = J. U = 120Ah 3600s 1h. Now we compute how long we can deliver a power of 100 W with this energy available.

Chapter 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 information

Chapter 21 Electric Current and Direct-Current Circuit

Chapter 21 Electric Current and Direct-Current Circuit Chapter 2 Electric Current and Direct-Current Circuit Outline 2- Electric Current 2-2 Resistance and Ohm s Law 2-3 Energy and Power in Electric Circuit 2-4 Resistance in Series and Parallel 2-5 Kirchhoff

More information

Kirchhoff's Rules and Applying Them

Kirchhoff'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 information

Capacitance, Resistance, DC Circuits

Capacitance, 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 information

Exercises on Voltage, Capacitance and Circuits. A d = (8.85 10 12 ) π(0.05)2 = 6.95 10 11 F

Exercises on Voltage, Capacitance and Circuits. A d = (8.85 10 12 ) π(0.05)2 = 6.95 10 11 F Exercises on Voltage, Capacitance and Circuits Exercise 1.1 Instead of buying a capacitor, you decide to make one. Your capacitor consists of two circular metal plates, each with a radius of 5 cm. The

More information

Series and Parallel. How we wire the world

Series and Parallel. How we wire the world Series and Parallel How we wire the world Series vs Parallel Circuits Series Circuit Electrons only have one path to flow through. Parallel Circuit There are MULTIPLE paths for the current to flow through.

More information

Chapter 7. DC Circuits

Chapter 7. DC Circuits Chapter 7 DC Circuits 7.1 Introduction... 7-3 Example 7.1.1: Junctions, branches and loops... 7-4 7.2 Electromotive Force... 7-5 7.3 Electrical Energy and Power... 7-9 7.4 Resistors in Series and in Parallel...

More information

Method 1: 30x50 30 50 18.75 15 18.75 0.8. 80 Method 2: 15

Method 1: 30x50 30 50 18.75 15 18.75 0.8. 80 Method 2: 15 The University of New South Wales School of Electrical Engineering and Telecommunications ELEC Electrical and Telecommunications Engineering Tutorial Solutions Q. In the figure below a voltage source and

More information

RC circuits Physlet Activity

RC circuits Physlet Activity RC circuits Physlet Activity If you are not already there, go to the URL http://cs.clark.edu/~mac/physlets/rcandrlcircuits/rctimec1.htm The screen below should appear. Figure 1. Working environment of

More information

Unit 7: Electric Circuits

Unit 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 information

Chapter 23 Circuits. Reading Quiz. Answer. Reading Quiz. Topics: Sample question:

Chapter 23 Circuits. Reading Quiz. Answer. Reading Quiz. Topics: Sample question: Chapter 23 Circuits Topics: Circuits containing multiple elements Series and parallel combinations RC circuits Electricity in the nervous system Reading Quiz 1. The bulbs in the circuit below are connected.

More information

People s Physics Book

People 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 information

Experiment #5, Series and Parallel Circuits, Kirchhoff s Laws

Experiment #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 information

Kirchhoff s Voltage Law and RC Circuits

Kirchhoff 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 information

MULTIPLE 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. 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 information

Solutions to Bulb questions

Solutions to Bulb questions Solutions to Bulb questions Note: We did some basic circuits with bulbs in fact three main ones I can think of I have summarized our results below. For the final exam, you must have an understanding of

More information

Lab 4 Series and Parallel Resistors

Lab 4 Series and Parallel Resistors Lab 4 Series and Parallel Resistors What You Need To Know: (a) (b) R 3 FIGURE - Circuit diagrams. (a) and are in series. (b) and are not in series. The Physics Last week you examined how the current and

More information

Experiment #6, Series and Parallel Circuits, Kirchhoff s Laws

Experiment #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 information

Experiment 9 ~ RC Circuits

Experiment 9 ~ RC Circuits Experiment 9 ~ RC Circuits Objective: This experiment will introduce you to the properties of circuits that contain both resistors AND capacitors. Equipment: 18 volt power supply, two capacitors (8 µf

More information

Capacitors. We charge a capacitor by connecting the two plates to a potential difference, such as a battery:

Capacitors. We charge a capacitor by connecting the two plates to a potential difference, such as a battery: RC Circuits PHYS 1112L Capacitors A capacitor is an electrical component that stores charge. The simplest capacitor is just two charged metal plates separated by a non-conducting material: In the diagram

More information

PHYSICS 111 LABORATORY Experiment #3 Current, Voltage and Resistance in Series and Parallel Circuits

PHYSICS 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 information

Physics 260 Calculus Physics II: E&M. RC Circuits

Physics 260 Calculus Physics II: E&M. RC Circuits RC Circuits Object In this experiment you will study the exponential charging and discharging of a capacitor through a resistor. As a by-product you will confirm the formulas for equivalent capacitance

More information

Chapter 19. Electric Circuits

Chapter 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 information

Electricity & Electronics 8: Capacitors in Circuits

Electricity & Electronics 8: Capacitors in Circuits Electricity & Electronics 8: Capacitors in Circuits Capacitors in Circuits IM This unit considers, in more detail, the charging and discharging of capacitors. It then investigates how capacitors behave

More information

Chapter 13: Electric Circuits

Chapter 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 information

Answer, Key Homework 11 David McIntyre 1 1 A

Answer, Key Homework 11 David McIntyre 1 1 A nswer, Key Homework 11 avid Mcntyre 1 This print-out should have 36 questions, check that it is complete. Multiple-choice questions may continue on the next column or page: find all choices before making

More information

1: (ta initials) 2: first name (print) last name (print) brock id (ab13cd) (lab date)

1: (ta initials) 2: first name (print) last name (print) brock id (ab13cd) (lab date) 1: (ta initials) 2: first name (print) last name (print) brock id (ab13cd) (lab date) Experiment 1 Capacitance In this Experiment you will learn the relationship between the voltage and charge stored on

More information

Lab 5 RC Circuits: Charge Changing in Time Observing the way capacitors in RC circuits charge and discharge.

Lab 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 information

Episode 129: Discharge of a capacitor: Q = Q o e -t/cr

Episode 129: Discharge of a capacitor: Q = Q o e -t/cr Episode 129: Discharge of a capacitor: Q = Q o e -t/cr Students will have already seen that the discharge is not a steady process (Episode 125), but it is useful to have graphical evidence before discussing

More information

Direct-Current Circuits

Direct-Current Circuits 8 Direct-Current Circuits Clicker Questions Question N.0 Description: Understanding circuits with parallel resistances. Question A battery is used to light a bulb as shown. A second bulb is connected by

More information

Problem Solving 8: RC and LR Circuits

Problem Solving 8: RC and LR Circuits MASSACHUSETTS INSTITUTE OF TECHNOLOGY Department of Physics Problem Solving 8: RC and LR Circuits Section Table and Group (e.g. L04 3C ) Names Hand in one copy per group at the end of the Friday Problem

More information

AP Physics Electricity and Magnetism #4 Electrical Circuits, Kirchoff s Rules

AP 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 information

Ch. 20 Electric Circuits

Ch. 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 information

A MODEL OF VOLTAGE IN A RESISTOR CIRCUIT AND AN RC CIRCUIT

A MODEL OF VOLTAGE IN A RESISTOR CIRCUIT AND AN RC CIRCUIT A MODEL OF VOLTAGE IN A RESISTOR CIRCUIT AND AN RC CIRCUIT ARJUN MOORJANI, DANIEL STRAUS, JENNIFER ZELENTY Abstract. We describe and model the workings of two simple electrical circuits. The circuits modeled

More information

Name: Lab Partner: Section:

Name: 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 information

ES250: Electrical Science. HW7: Energy Storage Elements

ES250: Electrical Science. HW7: Energy Storage Elements ES250: Electrical Science HW7: Energy Storage Elements Introduction This chapter introduces two more circuit elements, the capacitor and the inductor whose elements laws involve integration or differentiation;

More information

UNIT 24: CAPACITORS AND RC CIRCUITS Approximate Time Two 100-minute Sessions

UNIT 24: CAPACITORS AND RC CIRCUITS Approximate Time Two 100-minute Sessions Name St.No. - Date(YY/MM/DD) / / Section Group # UNIT 24: CAPACITORS AND RC CIRCUITS Approximate Time Two 100-minute Sessions + + + + - - - - The most universal and significant concept to come out of the

More information

Series and Parallel Circuits

Series and Parallel Circuits Series and Parallel Circuits Direct-Current Series Circuits A series circuit is a circuit in which the components are connected in a line, one after the other, like railroad cars on a single track. There

More information

Students will need about 30 minutes to complete these constructed response tasks.

Students 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 information

Charge and Discharge of a Capacitor

Charge and Discharge of a Capacitor Charge and Discharge of a Capacitor INTRODUCTION Capacitors 1 are devices that can store electric charge and energy. Capacitors have several uses, such as filters in DC power supplies and as energy storage

More information

RC CIRCUIT. THEORY: Consider the circuit shown below in Fig. 1: a S. V o FIGURE 1

RC CIRCUIT. THEORY: Consider the circuit shown below in Fig. 1: a S. V o FIGURE 1 RC CIRCUIT OBJECTIVE: To study the charging and discharging process for a capacitor in a simple circuit containing an ohmic resistance, R, and a capacitance, C. THEORY: Consider the circuit shown below

More information

Resistors in Series and Parallel

Resistors in Series and Parallel Resistors in Series and Parallel Bởi: OpenStaxCollege Most circuits have more than one component, called a resistor that limits the flow of charge in the circuit. A measure of this limit on charge flow

More information

Resistance Review Following the potential around a circuit Multiloop Circuits RC Circuits

Resistance Review Following the potential around a circuit Multiloop Circuits RC Circuits DC Circuits esistance eview Following the potential around a circuit Multiloop Circuits C Circuits Homework for today: ead Chapters 6, 7 Chapter 6 Questions, 3, 0 Chapter 6 Problems, 7, 35, 77 Homework

More information

Lab 9: Energy Conservation in Circuits & Charge on a Capacitor

Lab 9: Energy Conservation in Circuits & Charge on a Capacitor Part (1) Energy Conservation in Circuits OBJECTIVES In this part of the lab you will Write the energy conservation equation (loop rule) for several pairs of circuits Predict the relation between the currents

More information

Objectives. to understand how to use a voltmeter to measure voltage

Objectives. 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 information

Series-Parallel Circuits. Objectives

Series-Parallel Circuits. Objectives Series-Parallel Circuits Objectives Identify series-parallel configuration Analyze series-parallel circuits Apply KVL and KCL to the series-parallel circuits Analyze loaded voltage dividers Determine the

More information

Chapter 5. Parallel Circuits ISU EE. C.Y. Lee

Chapter 5. Parallel Circuits ISU EE. C.Y. Lee Chapter 5 Parallel Circuits Objectives Identify a parallel circuit Determine the voltage across each parallel branch Apply Kirchhoff s current law Determine total parallel resistance Apply Ohm s law in

More information

Experiment #9: RC and LR Circuits Time Constants

Experiment #9: RC and LR Circuits Time Constants Experiment #9: RC and LR Circuits Time Constants Purpose: To study the charging and discharging of capacitors in RC circuits and the growth and decay of current in LR circuits. Part 1 Charging RC Circuits

More information

Electrical Fundamentals Module 3: Parallel Circuits

Electrical 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 information

Chapter 18: Circuits and Circuit Elements 1. Schematic diagram: diagram that depicts the construction of an electrical apparatus

Chapter 18: Circuits and Circuit Elements 1. Schematic diagram: diagram that depicts the construction of an electrical apparatus Chapter 18: Circuits and Circuit Elements 1 Section 1: Schematic Diagrams and Circuits Schematic Diagrams Schematic diagram: diagram that depicts the construction of an electrical apparatus Uses symbols

More information

Experiment 4: Sensor Bridge Circuits (tbc 1/11/2007, revised 2/20/2007, 2/28/2007) I. Introduction. From Voltage Dividers to Wheatstone Bridges

Experiment 4: Sensor Bridge Circuits (tbc 1/11/2007, revised 2/20/2007, 2/28/2007) I. Introduction. From Voltage Dividers to Wheatstone Bridges Experiment 4: Sensor Bridge Circuits (tbc //2007, revised 2/20/2007, 2/28/2007) Objective: To implement Wheatstone bridge circuits for temperature measurements using thermistors. I. Introduction. From

More information

Physics, Chapter 27: Direct-Current Circuits

Physics, Chapter 27: Direct-Current Circuits University of Nebraska - Lincoln DigitalCommons@University of Nebraska - Lincoln Robert Katz Publications Research Papers in Physics and Astronomy 1-1-1958 Physics, Chapter 27: Direct-Current Circuits

More information

Last time : energy storage elements capacitor.

Last time : energy storage elements capacitor. Last time : energy storage elements capacitor. Charge on plates Energy stored in the form of electric field Passive sign convention Vlt Voltage drop across real capacitor can not change abruptly because

More information

Note-A-Rific: Characteristics

Note-A-Rific: Characteristics Note-A-Rific: Characteristics Any path along which electrons can flow is a circuit. For a continuous flow of electrons, there must be a complete circuit with no gaps. A gap is usually an electric switch

More information

R A _ + Figure 2: DC circuit to verify Ohm s Law. R is the resistor, A is the Ammeter, and V is the Voltmeter. A R _ +

R A _ + Figure 2: DC circuit to verify Ohm s Law. R is the resistor, A is the Ammeter, and V is the Voltmeter. A R _ + Physics 221 Experiment 3: Simple DC Circuits and Resistors October 1, 2008 ntroduction n this experiment, we will investigate Ohm s Law, and study how resistors behave in various combinations. Along the

More information

EE301 Lesson 14 Reading: 10.1-10.4, 10.11-10.12, 11.1-11.4 and 11.11-11.13

EE301 Lesson 14 Reading: 10.1-10.4, 10.11-10.12, 11.1-11.4 and 11.11-11.13 CAPACITORS AND INDUCTORS Learning Objectives EE301 Lesson 14 a. Define capacitance and state its symbol and unit of measurement. b. Predict the capacitance of a parallel plate capacitor. c. Analyze how

More information

RC Circuits. Honors Physics Note 002 c Alex R. Dzierba Honors Physics P222 - Spring, 2004

RC Circuits. Honors Physics Note 002 c Alex R. Dzierba Honors Physics P222 - Spring, 2004 R ircuits Honors Physics Note 2 c Alex R. Dziera Honors Physics P222 - Spring, 24 Introduction This note concerns the ehavior of circuits that include cominations of resistors, capacitors and possily a

More information

Capacitors and a Galvanometer

Capacitors and a Galvanometer Capacitors and a Galvanometer Object To investigate, understand and verify how capacitances are added together both in series and parallel and to consider the leakage of a capacitor. Also to employ a galvanometer

More information

Lab 3 - DC Circuits and Ohm s Law

Lab 3 - DC Circuits and Ohm s Law Lab 3 DC Circuits and Ohm s Law L3-1 Name Date Partners Lab 3 - DC Circuits and Ohm s Law OBJECTIES To learn to apply the concept of potential difference (voltage) to explain the action of a battery in

More information

R C DMM. b a. Power Supply. b a. Power Supply DMM. Red + Black - Red + Black -

R C DMM. b a. Power Supply. b a. Power Supply DMM. Red + Black - Red + Black - Sample Lab Report - PHYS 231 The following is an example of a well-written report that might be submitted by a PHYS 231 student. It begins with a short statement of what is being measured, and why. The

More information

very small Ohm s Law and DC Circuits Purpose: Students will become familiar with DC potentiometers circuits and Ohm s Law. Introduction: P31220 Lab

very small Ohm s Law and DC Circuits Purpose: Students will become familiar with DC potentiometers circuits and Ohm s Law. Introduction: P31220 Lab Ohm s Law and DC Circuits Purpose: Students will become familiar with DC potentiometers circuits and Ohm s Law. Introduction: Ohm s Law for electrical resistance, V = IR, states the relationship between

More information

( )( 10!12 ( 0.01) 2 2 = 624 ( ) Exam 1 Solutions. Phy 2049 Fall 2011

( )( 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 information

Two kinds of electrical charges

Two kinds of electrical charges ELECTRICITY NOTES Two kinds of electrical charges Positive charge Negative charge Electrons are negatively charged Protons are positively charged The forces from positive charges are canceled by forces

More information

Electrical Circuit Calculations

Electrical 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 information

PHYSICS LAB. Capacitor. Date: GRADE: PHYSICS DEPARTMENT JAMES MADISON UNIVERSITY. Revision November 2002. Capacitor 21

PHYSICS 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 information

DOING PHYSICS WITH MATLAB TRANSIENT RESPONSES IN RC CIRCUITS INTRODUCTION. Ian Cooper School of Physics, University of Sydney

DOING PHYSICS WITH MATLAB TRANSIENT RESPONSES IN RC CIRCUITS INTRODUCTION. Ian Cooper School of Physics, University of Sydney DOING PHYSIS WITH MATLAB IUITS BIOPHYSIS TANSIENT ESPONSES IN IUITS Ian ooper School of Physics, University of Sydney ian.cooper@sydney.edu.au MATLAB SIPTS (download files) simpson1d.m (function: integration

More information

RC Circuit (Power amplifier, Voltage Sensor)

RC 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 information

Physics 2212 GH Quiz #4 Solutions Spring 2015

Physics 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 information

Kirchhoff s Laws Physics Lab IX

Kirchhoff s Laws Physics Lab IX Kirchhoff s Laws Physics Lab IX Objective In the set of experiments, the theoretical relationships between the voltages and the currents in circuits containing several batteries and resistors in a network,

More information

Components in Series, Parallel, and Combination

Components in Series, Parallel, and Combination Components in Series, Parallel, and Combination Kirchoff s Laws VOLTAGE LAW: A series circuit of voltages across the various components must add up to be equal to the voltage applied to the circuit. CURRENT

More information

Student Exploration: Circuits

Student 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 information

W03 Analysis of DC Circuits. Yrd. Doç. Dr. Aytaç Gören

W03 Analysis of DC Circuits. Yrd. Doç. Dr. Aytaç Gören W03 Analysis of DC Circuits Yrd. Doç. Dr. Aytaç Gören ELK 2018 - Contents W01 Basic Concepts in Electronics W02 AC to DC Conversion W03 Analysis of DC Circuits (self and condenser) W04 Transistors and

More information

Eðlisfræði 2, vor 2007

Eðlisfræði 2, vor 2007 [ Assignment View ] [ Print ] Eðlisfræði 2, vor 2007 30. Inductance Assignment is due at 2:00am on Wednesday, March 14, 2007 Credit for problems submitted late will decrease to 0% after the deadline has

More information

EDEXCEL 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 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 information

Light Bulbs in Parallel Circuits

Light Bulbs in Parallel Circuits Light Bulbs in Parallel Circuits In the last activity, we analyzed several different series circuits. In a series circuit, there is only one complete pathway for the charge to travel. Here are the basic

More information

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

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 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 information

Physics 227: Lecture 10 Circuits, EMF, Power

Physics 227: Lecture 10 Circuits, EMF, Power Physics 227: Lecture 10 Circuits, EMF, Power Lecture 9 review: Current continuous, charge does not build up I = neav d t/ t = neav d. ρ = E/j. V = IR. Conductor resistivity increases with temperature,

More information

How Does it Flow? Electricity, Circuits, and Motors

How Does it Flow? Electricity, Circuits, and Motors How Does it Flow? Electricity, Circuits, and Motors Introduction In this lab, we will investigate the behavior of some direct current (DC) electrical circuits. These circuits are the same ones that move

More information

Chapter 5: Analysis of Time-Domain Circuits

Chapter 5: Analysis of Time-Domain Circuits Chapter 5: Analysis of Time-Domain Circuits This chapter begins the analysis of circuits containing elements with the ability to store energy: capacitors and inductors. We have already defined each of

More information

Experiment 8 Series-Parallel Circuits

Experiment 8 Series-Parallel Circuits Experiment 8 Series-Parallel Circuits EL 111 - DC Fundamentals By: Walter Banzhaf, E.K. Smith, and Winfield Young University of Hartford Ward College of Technology Objectives: 1. For the student to measure

More information

Capacitors & RC Circuits

Capacitors & RC Circuits Capacitors & C Circuits Name: EQUIPMENT NEEDED: Circuits Experiment Board One D-cell Battery Wire leads Multimeter Capacitors(100 F, 330 F) esistors(1k, 4.7k ) Logger Pro Software, ULI Purpose The purpose

More information

Homework #11 203-1-1721 Physics 2 for Students of Mechanical Engineering

Homework #11 203-1-1721 Physics 2 for Students of Mechanical Engineering Homework #11 203-1-1721 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 information

People s Physics Book

People s Physics Book The Big Idea When current flows through wires and resistors in a circuit as a result of an electric potential, charge does not build up significantly anywhere on the path. Capacitors are devices placed

More information

) 0.7 =1.58 10 2 N m.

) 0.7 =1.58 10 2 N m. Exam 2 Solutions Prof. Paul Avery Prof. Andrey Korytov Oct. 29, 2014 1. A loop of wire carrying a current of 2.0 A is in the shape of a right triangle with two equal sides, each with length L = 15 cm as

More information

Discharge of a Capacitor

Discharge of a Capacitor Discharge of a Capacitor THEORY The charge Q on a capacitor s plate is proportional to the potential difference V across the capacitor. We express this with Q = C V (1) where C is a proportionality constant

More information

Multiple Choice Questions for Physics 1 BA113 Chapter 23 Electric Fields

Multiple Choice Questions for Physics 1 BA113 Chapter 23 Electric Fields Multiple Choice Questions for Physics 1 BA113 Chapter 23 Electric Fields 63 When a positive charge q is placed in the field created by two other charges Q 1 and Q 2, each a distance r away from q, the

More information