25-29 28 The current in a discharging RC circuit is given by I(0) 7[1-exp(-(3s')t)]A. Ifthe capacitor has a capacitance of 5F, what is the resistance of the resistor?67A. 150B. (3/7)2C. (1/21)2D. (1/15)2E. (3/5)249. What is the time constant t ofa circuit consisting of a 3 x 1ot*2 resistor in serieswith a 2x10 F capacitor and a 6V battery?A. (9/5) x 10 sB. 6.0 x 10'sC. (3/2) x 10"sD. (6/5) x 10'sE. (2/3) x 10 s 25. Which of the following equation is valid for Loop A7A. +2V+4V +701, = 0B. 2V+4V+701 = 0C. +2V+ 4V - 721 =0D. 2V-4V- 701 = 0E. 2V+4V - 7521=0%3DFor the next two items, consider the circuit whose diagram is shown below.5VR = 20R, = 205V3V3V26. What is the current / across R?A. 0 AB. IAC. 2 AD. 9 AE. 18 A27. What are the directions of currents /, and s through their corresponding resistors?A. I:0 p, l: q→rB. 1:0 p; /: q ErC. Ino p: /:q→rD. I:0 p; 1: q ErE. No direction (no current)

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28. The current in a discharging RC circuit is given by /(0) 7[1-exp(-(3s')t)]A. If the capacitor has a capacitance of 5F, what is the resistance of the resistor? 67 A. 150 B. (3/7)2 C. (1/21)2 D. (1/15)2 E. (3/5)2

28. The current in a discharging RC circuit is given by /(0) 7[1-exp(-(3s')t)]A. If the capacitor has a capacitance of 5F, what is the resistance of the resistor? 67 A. 150 B. (3/7)2 C. (1/21)2 D. (1/15)2 E. (3/5)2

College Physics

1st Edition

ISBN:9781938168000

Author:Paul Peter Urone, Roger Hinrichs

Publisher:Paul Peter Urone, Roger Hinrichs

Chapter20: Electric Current, Resistance, And Ohm's Law

Section: Chapter Questions

Problem 81PE: Two different electrical devices have the same power consumption, but one is meant to be operated on...

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25-29

28 The current in a discharging RC circuit is given by I(0) 7[1-exp(-(3s')t)]A. If
the capacitor has a capacitance of 5F, what is the resistance of the resistor?
67
A. 150
B. (3/7)2
C. (1/21)2
D. (1/15)2
E. (3/5)2
49. What is the time constant t ofa circuit consisting of a 3 x 1ot*2 resistor in series
with a 2x10 F capacitor and a 6V battery?
A. (9/5) x 10 s
B. 6.0 x 10's
C. (3/2) x 10"s
D. (6/5) x 10's
E. (2/3) x 10 s

25. Which of the following equation is valid for Loop A7
A. +2V+4V +701, = 0
B. 2V+4V+701 = 0
C. +2V+ 4V - 721 =0
D. 2V-4V- 701 = 0
E. 2V+4V - 7521=0
%3D
For the next two items, consider the circuit whose diagram is shown below.
5V
R = 20
R, = 20
5V
3V
3V
26. What is the current / across R?
A. 0 A
B. IA
C. 2 A
D. 9 A
E. 18 A
27. What are the directions of currents /, and s through their corresponding resistors?
A. I:0 p, l: q→r
B. 1:0 p; /: q Er
C. Ino p: /:q→r
D. I:0 p; 1: q Er
E. No direction (no current)

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