Question 1

Kirchhoff's rules: For the circuit shown in the figure, what is the current through resistor R3?

Accepted Answer

A)  0.043 A 
B)  1.5 A 
C)  0.028 A 
D)  0.086 A

Question 2

Resistors in combination: For the circuit shown in the figure, determine the current in
(a) the 1.0-Ω resistor.
(b) the 3.0-Ω resistor.
(c) the 4.0-Ω resistor.

Accepted Answer

The answer of Resistors in combination: For the circuit shown...

Question 3

Meters: A galvanometer has an internal resistance of 100 Ω and deflects full-scale at 2.00 mA. What size resistor should be added to the galvanometer to convert it to a milliammeter capable of reading up to 4.00 mA, and how should this resistor be connected to the galvanometer?

Accepted Answer

A)  50.0 Ω in series with the galvanometer 
B)  50.0 Ω in parallel with the galvanometer 
C)  75.0 Ω in parallel with the galvanometer 
D)  100 Ω in series with the galvanometer 
E)  100 Ω in parallel with the galvanometer

Question 4

Meters: A galvanometer has a coil with a resistance of 24.0 Ω, and a current of 180 μA causes it to deflect full scale. If this galvanometer is to be used to construct an ammeter that can read up to 10.0 A, what shunt resistor is required?

Accepted Answer

A)  123 µΩ 
B)  234 µΩ 
C)  342 µΩ 
D)  432 µΩ 
E)  423 µΩ

Question 5

Resistors in combination: In the circuit shown in the figure, four identical resistors labeled A to D are connected to a battery as shown. S1 and S2 are switches. Which of the following actions would result in the GREATEST amount of current through resistor A?

Accepted Answer

A)  closing both switches 
B)  closing S1 only 
C)  closing S2 only 
D)  leaving both switches open as shown.

Question 6

Meters: A galvanometer has an internal resistance of 100 Ω and deflects full-scale at a current of 2.00 mA. What size resistor should be added to it to convert it to a millivoltmeter capable of reading up to 400 mV, and how should this resistor be connected to the galvanometer?

Accepted Answer

A)  50.0 Ω in series with the galvanometer 
B)  50.0 Ω in parallel with the galvanometer 
C)  75.0 Ω in parallel with the galvanometer 
D)  100 Ω in series with the galvanometer 
E)  100 Ω in parallel with the galvanometer

Question 7

Resistors in combination: For the circuit shown in the figure, I = 0.50 A and R = 12 Ω. What is the value of the emf ε?

Accepted Answer

A)  18 V 
B)  24 V 
C)  6.0 V 
D)  12 V 
E)  48 V

Question 8

Kirchhoff's rules: A multiloop circuit is shown in the figure. It is not necessary to solve the entire circuit. Compared to the polarity shown in the figure, the emf ε1 is closest to

Accepted Answer

A)  -5 V. 
B)  5 V. 
C)  45 V. 
D)  51 V. 
E)  -51 V.

Question 9

RC circuits: A light bulb is connected in the circuit shown in the figure with the switch S open and the capacitor uncharged. The battery has no appreciable internal resistance. Which one of the following graphs best describes the brightness B of the bulb as a function of time t after closing the switch?

Accepted Answer

A)  1 
B)  2 
C)  3 
D)  4 
E)  5

Question 10

Resistors in combination: As more resistors are added in parallel across a constant voltage source, the power supplied by the source

Accepted Answer

A)  increases. 
B)  decreases. 
C)  does not change.

Question 11

Kirchhoff's rules: A multiloop circuit is shown in the figure. Some circuit quantities are not labeled. It is not necessary to solve the entire circuit. The current I2 is closest to

Accepted Answer

A)  +0.1 A. 
B)  +0.3 A. 
C)  +0.5 A. 
D)  -0.1 A. 
E)  -0.3 A.

Question 12

Kirchhoff's rules: A multiloop circuit is shown in the figure. Some circuit quantities are not labeled. It is not necessary to solve the entire circuit. The current I1 is closest to

Accepted Answer

A)  zero. 
B)  +0.2 A. 
C)  +0.4 A. 
D)  -0.2 A. 
E)  -0.4 A.

Question 13

RC circuits: For the circuit shown in the figure, the switch S is initially open and the capacitor is uncharged. The switch is then closed at time t = 0. How many seconds after closing the switch will the energy stored in the capacitor be equal to 50.2 mJ?

Accepted Answer

A)  81 s 
B)  65 s 
C)  97 s 
D)  110 s 
E)  130 s

Question 14

Kirchhoff's rules: For the circuit shown in the figure, what current does the ideal ammeter read?

Accepted Answer

A)  0.033 A 
B)  0.078 A 
C)  0.23 A 
D)  0.12 A

Exam 22: Gausss Law

Kirchhoff's rules: For the circuit shown in the figure, what is the current through resistor R₃?

Resistors in combination: For the circuit shown in the figure, determine the current in (a) the 1.0-Ω resistor. (b) the 3.0-Ω resistor. (c) the 4.0-Ω resistor.

Meters: A galvanometer has an internal resistance of 100 Ω and deflects full-scale at 2.00 mA. What size resistor should be added to the galvanometer to convert it to a milliammeter capable of reading up to 4.00 mA, and how should this resistor be connected to the galvanometer?

Meters: A galvanometer has a coil with a resistance of 24.0 Ω, and a current of 180 μA causes it to deflect full scale. If this galvanometer is to be used to construct an ammeter that can read up to 10.0 A, what shunt resistor is required?

Resistors in combination: In the circuit shown in the figure, four identical resistors labeled A to D are connected to a battery as shown. S₁ and S₂ are switches. Which of the following actions would result in the GREATEST amount of current through resistor A?

Meters: A galvanometer has an internal resistance of 100 Ω and deflects full-scale at a current of 2.00 mA. What size resistor should be added to it to convert it to a millivoltmeter capable of reading up to 400 mV, and how should this resistor be connected to the galvanometer?

Resistors in combination: For the circuit shown in the figure, I = 0.50 A and R = 12 Ω. What is the value of the emf ε?

Kirchhoff's rules: A multiloop circuit is shown in the figure. It is not necessary to solve the entire circuit. Compared to the polarity shown in the figure, the emf ε₁is closest to

Resistors in combination: As more resistors are added in parallel across a constant voltage source, the power supplied by the source

Kirchhoff's rules: A multiloop circuit is shown in the figure. Some circuit quantities are not labeled. It is not necessary to solve the entire circuit. The current I₂ is closest to

Kirchhoff's rules: A multiloop circuit is shown in the figure. Some circuit quantities are not labeled. It is not necessary to solve the entire circuit. The current I₁ is closest to

RC circuits: For the circuit shown in the figure, the switch S is initially open and the capacitor is uncharged. The switch is then closed at time t = 0. How many seconds after closing the switch will the energy stored in the capacitor be equal to 50.2 mJ?

Kirchhoff's rules: For the circuit shown in the figure, what current does the ideal ammeter read?