Question 1

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

Question 2

Three resistors are connected across an ideal 2.0-V DC battery as shown in the figure.
(a) At what rate does the battery supply energy to the resistors?
(b) At what rate is heat produced in the 6.0-Ω resistor?

Accepted Answer

The answer of Three resistors are connected across an ideal...

Question 3

The figure shows three identical lightbulbs connected to a battery having a constant voltage across its terminals. What happens to the brightness of lightbulb 1 when the switch S is closed?

Accepted Answer

A)  The brightness will increase momentarily then return to its previous level. 
B)  The brightness increases permanently. 
C)  The brightness will decrease momentarily then return to its previous level. 
D)  The brightness remains the same as before the switch is closed. 
E)  The brightness decreases permanently.

Question 4

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 5

For the circuit shown in the figure, the current in the 8-Ω resistor is 0.50 A, and all quantities are accurate to 2 significant figures. What is the current in the 2-Ω resistor?

Accepted Answer

A)  2.25 A 
B)  0.75 A 
C)  4.5 A 
D)  9.5 A 
E)  6.4 A

Question 6

For the circuit shown in the figure, all quantities are accurate to 2 significant figures. What is the value of the current I1?

Accepted Answer

A)  0.32 A 
B)  0.11 A 
C)  0.29 A 
D)  0.61 A 
E)  0.89 A

Question 7

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 8

Consider the circuit shown in the figure. Note that two currents are shown. Calculate the emfs ε₁and ε₃.

Accepted Answer

The answer of Consider the circuit shown in the figure....

Question 9

Three resistors having resistances of 4.0 Ω, 6.0 Ω, and 10.0 Ω are connected in parallel. If the combination is connected in series with an ideal 12-V battery and a 2.0-Ω resistor, what is the current through the 10.0-Ω resistor?

Accepted Answer

A)  0.59 A 
B)  2.7 A 
C)  6.4 A 
D)  11.2 A 
E)  16 A

Question 10

When four identical resistors are connected to an ideal battery of voltage V = 10 V as shown in the figure, the current I is equal to 0.20 A. What is the value of the resistance R of the resistors?

Accepted Answer

A)  20 Ω 
B)  40 Ω 
C)  30 Ω 
D)  50 Ω 
E)  10 Ω

Question 11

For the circuit shown in the figure, determine the current in
(a) the 7.0-Ω resistor.
(b) the 8.0-Ω resistor.
(c) the 4.0-Ω resistor.

Accepted Answer

The answer of For the circuit shown in the figure,...

Question 12

A 5.0-Ω resistor and a 9.0-Ω resistor are connected in parallel. A 4.0-Ω resistor is then connected in series with this parallel combination. An ideal 6.0-V battery is then connected across the series-parallel combination of the three resistors. What is the current through
(a) the 4.0-Ω resistor?
(b) the 5.0-Ω resistor?
(c) the 9.0-Ω resistor?

Accepted Answer

The answer of A 5.0-Ω resistor and a 9.0-Ω resistor...

Question 13

A 4.00-Ω resistor, an 8.00-Ω resistor, and a 24.0-Ω resistor are connected together.
(a) What is the maximum resistance that can be produced using all three resistors?
(b) What is the minimum resistance that can be produced using all three resistors?
(c) How would you connect these three resistors to obtain a resistance of 10.0 Ω?
(d) How would you connect these three resistors to obtain a resistance of 8.00 Ω?

Accepted Answer

The answer of A 4.00-Ω resistor, an 8.00-Ω resistor, and...

Question 14

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 15

An uncharged 1.0-μF capacitor is connected in series with a 23-kΩ resistor, an ideal 7.0-V battery, and an open switch. What is the voltage across the capacitor 11 ms after closing the switch?

Accepted Answer

A)  2.7 V 
B)  1.6 V 
C)  2.6 V 
D)  0.62 V

Question 16

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 17

What is the maximum current that can be drawn from a 1.50-V battery with an internal resistance of 0.30 ohm?

Accepted Answer

A)  2.5 A 
B)  5.0 A 
C)  0.45 A 
D)  0.20 A 
E)  4.5 A

Question 18

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 19

A 4.0-μF capacitor that is initially uncharged is connected in series with a 4.0-kΩ resistor and an ideal 17.0-V battery. How much energy is stored in the capacitor 17 ms after the battery has been connected?

Accepted Answer

A)  250,000 nJ 
B)  15,000 kJ 
C)  25 µJ 
D)  890 nJ

Question 20

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

Exam 25: Direct-Current Circuits

For the circuit shown in the figure, what current does the ideal ammeter read?

Three resistors are connected across an ideal 2.0-V DC battery as shown in the figure. (a) At what rate does the battery supply energy to the resistors? (b) At what rate is heat produced in the 6.0-Ω resistor?

The figure shows three identical lightbulbs connected to a battery having a constant voltage across its terminals. What happens to the brightness of lightbulb 1 when the switch S is closed?

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

For the circuit shown in the figure, the current in the 8-Ω resistor is 0.50 A, and all quantities are accurate to 2 significant figures. What is the current in the 2-Ω resistor?

For the circuit shown in the figure, all quantities are accurate to 2 significant figures. What is the value of the current I₁?

For the circuit shown in the figure, what is the current through resistor R₃?

Consider the circuit shown in the figure. Note that two currents are shown. Calculate the emfs ε₁and ε₃.

Three resistors having resistances of 4.0 Ω, 6.0 Ω, and 10.0 Ω are connected in parallel. If the combination is connected in series with an ideal 12-V battery and a 2.0-Ω resistor, what is the current through the 10.0-Ω resistor?

When four identical resistors are connected to an ideal battery of voltage V = 10 V as shown in the figure, the current I is equal to 0.20 A. What is the value of the resistance R of the resistors?

For the circuit shown in the figure, determine the current in (a) the 7.0-Ω resistor. (b) the 8.0-Ω resistor. (c) the 4.0-Ω resistor.

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?

An uncharged 1.0-μF capacitor is connected in series with a 23-kΩ resistor, an ideal 7.0-V battery, and an open switch. What is the voltage across the capacitor 11 ms after closing the switch?

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?

What is the maximum current that can be drawn from a 1.50-V battery with an internal resistance of 0.30 ohm?

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?

A 4.0-μF capacitor that is initially uncharged is connected in series with a 4.0-kΩ resistor and an ideal 17.0-V battery. How much energy is stored in the capacitor 17 ms after the battery has been connected?

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?

Exam 25: Direct-Current Circuits

For the circuit shown in the figure, what current does the ideal ammeter read?

Three resistors are connected across an ideal 2.0-V DC battery as shown in the figure. (a) At what rate does the battery supply energy to the resistors? (b) At what rate is heat produced in the 6.0-Ω resistor?

The figure shows three identical lightbulbs connected to a battery having a constant voltage across its terminals. What happens to the brightness of lightbulb 1 when the switch S is closed?

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

For the circuit shown in the figure, the current in the 8-Ω resistor is 0.50 A, and all quantities are accurate to 2 significant figures. What is the current in the 2-Ω resistor?

For the circuit shown in the figure, all quantities are accurate to 2 significant figures. What is the value of the current I1?

For the circuit shown in the figure, what is the current through resistor R3?

Consider the circuit shown in the figure. Note that two currents are shown. Calculate the emfs ε1 and ε3.

Three resistors having resistances of 4.0 Ω, 6.0 Ω, and 10.0 Ω are connected in parallel. If the combination is connected in series with an ideal 12-V battery and a 2.0-Ω resistor, what is the current through the 10.0-Ω resistor?

When four identical resistors are connected to an ideal battery of voltage V = 10 V as shown in the figure, the current I is equal to 0.20 A. What is the value of the resistance R of the resistors?

For the circuit shown in the figure, determine the current in (a) the 7.0-Ω resistor. (b) the 8.0-Ω resistor. (c) the 4.0-Ω resistor.

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?

An uncharged 1.0-μF capacitor is connected in series with a 23-kΩ resistor, an ideal 7.0-V battery, and an open switch. What is the voltage across the capacitor 11 ms after closing the switch?

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?

What is the maximum current that can be drawn from a 1.50-V battery with an internal resistance of 0.30 ohm?

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?

A 4.0-μF capacitor that is initially uncharged is connected in series with a 4.0-kΩ resistor and an ideal 17.0-V battery. How much energy is stored in the capacitor 17 ms after the battery has been connected?

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?

For the circuit shown in the figure, all quantities are accurate to 2 significant figures. What is the value of the current I₁?

For the circuit shown in the figure, what is the current through resistor R₃?

Consider the circuit shown in the figure. Note that two currents are shown. Calculate the emfs ε₁and ε₃.

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?