Question 1

A network of capacitors is mostly inside a sealed box, but one capacitor CX is sticking out, as shown in the figure. When you connect a multimeter across points a and b, it reads 27.0 µF. What is CX? X is sticking out, as shown in the figure. When you connect a multimeter across points a and b, it reads 27.0 µF. What is CX?   A)  27.0 µF B)  23.0 µF C)  4.0 µF D)  2.4 µF E)  2.2 µF" class="answers-bank-image d-inline" rel="preload" >

Accepted Answer

A)   27.0 µF
B)   23.0 µF
C)   4.0 µF
D)   2.4 µF
E)   2.2 µFF) B) and D)
G) C) and D)

Question 2

A resistor, an uncharged capacitor, a dc voltage source, and an open switch are all connected in series. The switch is closed at time t = 0 s. Which one of the following is a correct statement about the circuit?

Accepted Answer

A)   The capacitor charges to its maximum value in one time constant.
B)   The capacitor charges to its maximum value in two time constants.
C)   The potential difference across the resistor is always equal to the potential difference across the capacitor.
D)   Current flows through the circuit even after the capacitor is essentially fully charged.
E)   Once the capacitor is essentially fully charged, there is no current in the circuit.F) A) and B)
G) A) and C)

Question 3

An uncharged capacitor is connected in series with a resistor, a dc battery, and an open switch. At time t = 0 s, the switch is closed. Which of the graphs below best describes the charge Q on the capacitor as a function of time t?

Accepted Answer

A)  
B)  
C)  
D)  
E)  F) A) and E)
G) A) and C)

Question 4

A resistor with a resistance of 360 Ω is in a series circuit with a capacitor of capacitance 7.3 × 10-6 F. What capacitance must be placed in parallel with the original capacitance to change the capacitive time constant of the combination to three times its original value?

Accepted Answer

Question 5

A 1.0-µF capacitor and a 2.0-µF capacitor are connected together, and then that combination is connected across a 3.0-V potential source (a battery). What is the potential difference across the 2.0-µF capacitor if the capacitors are connected (a) in series or (b) in parallel?

Accepted Answer

(a) 1.0 V ...

Question 6

Three resistors with resistances of 2.0 Ω, 6.0 Ω, and 12 Ω are connected across an ideal dc voltage source V = 2.0 V, as shown in the figure. What is the total current I in this circuit?

Accepted Answer

A)   0.70 A
B)   1.5 A
C)   2.0 A
D)   3.0 A
E)   6.0 AF) None of the above
G) A) and B)

Question 7

A 2.0-μF capacitor and a 4.0-μF capacitor are connected in series across an 8.0-V potential source. What is the charge on the 2.0-μF capacitor?

Accepted Answer

A)   2.0 μC
B)   4.0 μC
C)   12 μC
D)   11 μC
E)   25 μCF) B) and C)
G) All of the above

Question 8

For the circuit shown in the figure, what is the power dissipated in the 2.0-Ω resistor? All the numbers shown are accurate to three significant figures.

Accepted Answer

A)   5.33 W
B)   8.00 W
C)   6.67 W
D)   2.67 W
E)   3.56 WF) A) and B)
G) A) and C)

Question 9

A system of four capacitors is connected across a 90-V voltage source as shown in the figure.
(a) What is the charge on the 4.0-µF capacitor?
(b) What is the charge on the 2.0-µF capacitor?

Accepted Answer

(a) 120 µC...

Question 10

Four resistors are connected across an ideal dc battery with voltage V as shown in the figure. Assume that all quantities shown are accurate to two significant figures. If the total current through this circuit is I = 2.0 A, what is the current through the 4.0-Ω resistor?

Accepted Answer

A)   1.0 A
B)   2.0 A
C)   3.0 A
D)   1.3 A
E)   2.4 AF) B) and E)
G) C) and E)

Question 11

For the circuit shown in the figure, the ideal battery has an emf ε = 80 V. The four resistors have resistances of R1 = 14 $\Omega$ R2= 21 $\Omega$ R3 = 21 $\Omega$ and R4 = 14 $\Omega$ Calculate the rate at which heat is being generated in the resistor R4.

Accepted Answer

Question 12

A multiloop circuit is shown in the figure. Find the current I1 if the batteries are ideal. (It is not necessary to solve the entire circuit.)  1 if the batteries are ideal. (It is not necessary to solve the entire circuit.)    A)  -2 A B)  2 A C)  6 A D)  -5 A E)  0 A" class="answers-bank-image d-inline" rel="preload" >

Accepted Answer

A)   -2 A
B)   2 A
C)   6 A
D)   -5 A
E)   0 AF) D) and E)
G) C) and E)

Question 13

Determine the current in the 4.0-Ω resistor for the circuit shown in the figure. Assume that the batteries are ideal and that all numbers are accurate to two significant figures.

Accepted Answer

A)   0.28 A
B)   1.3 A
C)   1.6 A
D)   2.1 AE) B) and C)
F) None of the above

Question 14

Determine the current in the 18-Ω resistor for the circuit shown in the figure assuming that the batteries are ideal.

Accepted Answer

A)   0.25 A
B)   0.50 A
C)   0.75 A
D)   1.0 AE) C) and D)
F) A) and C)

Question 15

The capacitive network shown in the figure is assembled with initially uncharged capacitors. Assume that all the quantities in the figure are accurate to two significant figures. The switch S in the network is kept open throughout. What is the total energy stored in the seven capacitors?

Accepted Answer

A)   48 mJ
B)   72 mJ
C)   96 mJ
D)   120 mJ
E)   144 mJF) A) and E)
G) C) and D)

Question 16

Three resistors of 12 Ω, 12 Ω, and 6.0 Ω are connected together, and an ideal 12-V battery is connected across the combination. What is the current from the battery if they are connected (a) in series or (b) in parallel?

Accepted Answer

(a) 0.40 A...

Question 17

A multiloop circuit is shown in the figure, but some quantities are not labeled. Find the current I2 if the batteries are ideal. (It is not necessary to solve the entire circuit.)  2 if the batteries are ideal. (It is not necessary to solve the entire circuit.)    A)  +0.1 A B)  +0.3 A C)  +0.5 A D)  -0.1 A E)  -0.3 A" class="answers-bank-image d-inline" rel="preload" >

Accepted Answer

A)   +0.1 A
B)   +0.3 A
C)   +0.5 A
D)   -0.1 A
E)   -0.3 AF) A) and B)
G) A) and C)

Question 18

A multiloop circuit is shown in the figure, but some quantities are not labeled. Find the emf ε if the batteries are ideal. (It is not necessary to solve the entire circuit.)

Accepted Answer

A)   +3 V
B)   +19 V
C)   -3 V
D)   -10 V
E)   -19 VF) A) and E)
G) B) and E)

Question 19

The network shown is assembled with uncharged capacitors X , Y, and Z, with 
CX=3.0  μ\muμ F, CY=5.0 μ\muμ F and CZ=1.0  μ\muμ F  The switches S1 and S2 are initially open, and a potential difference Vab = 120 V is applied between points a and b. After the network is assembled, switch S1 is then closed, but switch S2 is kept open. How much charge is finally stored in capacitor Y? X=3.0  \mu F, CY=5.0 \mu F and CZ=1.0  \mu F  The switches S1 and S2 are initially open, and a potential difference Vab = 120 V is applied between points a and b. After the network is assembled, switch S1 is then closed, but switch S2 is kept open. How much charge is finally stored in capacitor Y?   A)  110 µC B)  54 µC C)  81 µC D)  140 µC E)  160 µC " class="answers-bank-image d-inline" rel="preload" >

Accepted Answer

A)   110 µC
B)   54 µC
C)   81 µC
D)   140 µC
E)   160 µC F) A) and E)
G) A) and B)

Question 20

Suppose you have two capacitors and want to use them to store the maximum amount of energy by connecting them across a voltage source. You should connect them

Accepted Answer

A)   in series across the source.
B)   in parallel across the source.
C)   It doesn't matter because the stored energy is the same either way.D) A) and B)
E) A) and C)

Exam 23: Circuits

Determine the current in the 18-Ω resistor for the circuit shown in the figure assuming that the batteries are ideal.

Correct Answer
verified

A 2.0-μF capacitor and a 4.0-μF capacitor are connected in series across an 8.0-V potential source. What is the charge on the 2.0-μF capacitor?

Correct Answer
verified

A multiloop circuit is shown in the figure, but some quantities are not labeled. Find the emf ε if the batteries are ideal. (It is not necessary to solve the entire circuit.)

Correct Answer
verified

Three resistors with resistances of 2.0 Ω, 6.0 Ω, and 12 Ω are connected across an ideal dc voltage source V = 2.0 V, as shown in the figure. What is the total current I in this circuit?

Correct Answer
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Correct Answer
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A 1.0-µF capacitor and a 2.0-µF capacitor are connected together, and then that combination is connected across a 3.0-V potential source (a battery). What is the potential difference across the 2.0-µF capacitor if the capacitors are connected (a) in series or (b) in parallel?

Correct Answer
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(a) 1.0 V ...
View Answer

A resistor with a resistance of 360 Ω is in a series circuit with a capacitor of capacitance 7.3 × 10^-6 F. What capacitance must be placed in parallel with the original capacitance to change the capacitive time constant of the combination to three times its original value?

Correct Answer
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Suppose you have two capacitors and want to use them to store the maximum amount of energy by connecting them across a voltage source. You should connect them

Correct Answer
verified

Determine the current in the 4.0-Ω resistor for the circuit shown in the figure. Assume that the batteries are ideal and that all numbers are accurate to two significant figures.

Correct Answer
verified

Four resistors are connected across an ideal dc battery with voltage V as shown in the figure. Assume that all quantities shown are accurate to two significant figures. If the total current through this circuit is I = 2.0 A, what is the current through the 4.0-Ω resistor?

Correct Answer
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A multiloop circuit is shown in the figure. Find the current I₁ if the batteries are ideal. (It is not necessary to solve the entire circuit.)

Correct Answer
verified

An uncharged capacitor is connected in series with a resistor, a dc battery, and an open switch. At time t = 0 s, the switch is closed. Which of the graphs below best describes the charge Q on the capacitor as a function of time t?

Correct Answer
verified

A resistor, an uncharged capacitor, a dc voltage source, and an open switch are all connected in series. The switch is closed at time t = 0 s. Which one of the following is a correct statement about the circuit?

Correct Answer
verified

Three resistors of 12 Ω, 12 Ω, and 6.0 Ω are connected together, and an ideal 12-V battery is connected across the combination. What is the current from the battery if they are connected (a) in series or (b) in parallel?

Correct Answer
verified
(a) 0.40 A...
View Answer

A network of capacitors is mostly inside a sealed box, but one capacitor C_X is sticking out, as shown in the figure. When you connect a multimeter across points a and b, it reads 27.0 µF. What is C_X?

Correct Answer
verified

Correct Answer
verified

The capacitive network shown in the figure is assembled with initially uncharged capacitors. Assume that all the quantities in the figure are accurate to two significant figures. The switch S in the network is kept open throughout. What is the total energy stored in the seven capacitors?

Correct Answer
verified

A system of four capacitors is connected across a 90-V voltage source as shown in the figure. (a) What is the charge on the 4.0-µF capacitor? (b) What is the charge on the 2.0-µF capacitor?

Correct Answer
verified
(a) 120 µC...
View Answer

A multiloop circuit is shown in the figure, but some quantities are not labeled. Find the current I₂ if the batteries are ideal. (It is not necessary to solve the entire circuit.)

Correct Answer
verified

For the circuit shown in the figure, what is the power dissipated in the 2.0-Ω resistor? All the numbers shown are accurate to three significant figures.

Correct Answer
verified

Exam 23: Circuits

Determine the current in the 18-Ω resistor for the circuit shown in the figure assuming that the batteries are ideal.

Correct AnswerverifiedShow Answer

A 2.0-μF capacitor and a 4.0-μF capacitor are connected in series across an 8.0-V potential source. What is the charge on the 2.0-μF capacitor?

Correct AnswerverifiedShow Answer

A multiloop circuit is shown in the figure, but some quantities are not labeled. Find the emf ε if the batteries are ideal. (It is not necessary to solve the entire circuit.)

Correct AnswerverifiedShow Answer

Three resistors with resistances of 2.0 Ω, 6.0 Ω, and 12 Ω are connected across an ideal dc voltage source V = 2.0 V, as shown in the figure. What is the total current I in this circuit?

Correct AnswerverifiedShow Answer

For the circuit shown in the figure, the ideal battery has an emf ε = 80 V. The four resistors have resistances of R1 = 14 Ω\OmegaΩ R2= 21 Ω\OmegaΩ R3 = 21 Ω\OmegaΩ and R4 = 14 Ω\OmegaΩ Calculate the rate at which heat is being generated in the resistor R4.

Correct AnswerverifiedShow Answer

A 1.0-µF capacitor and a 2.0-µF capacitor are connected together, and then that combination is connected across a 3.0-V potential source (a battery). What is the potential difference across the 2.0-µF capacitor if the capacitors are connected (a) in series or (b) in parallel?

Correct Answerverified(a) 1.0 V ...View AnswerShow Answer

A resistor with a resistance of 360 Ω is in a series circuit with a capacitor of capacitance 7.3 × 10-6 F. What capacitance must be placed in parallel with the original capacitance to change the capacitive time constant of the combination to three times its original value?

Correct AnswerverifiedShow Answer

Suppose you have two capacitors and want to use them to store the maximum amount of energy by connecting them across a voltage source. You should connect them

Correct AnswerverifiedShow Answer

Determine the current in the 4.0-Ω resistor for the circuit shown in the figure. Assume that the batteries are ideal and that all numbers are accurate to two significant figures.

Correct AnswerverifiedShow Answer

Four resistors are connected across an ideal dc battery with voltage V as shown in the figure. Assume that all quantities shown are accurate to two significant figures. If the total current through this circuit is I = 2.0 A, what is the current through the 4.0-Ω resistor?

Correct AnswerverifiedShow Answer

A multiloop circuit is shown in the figure. Find the current I1 if the batteries are ideal. (It is not necessary to solve the entire circuit.)

Correct AnswerverifiedShow Answer

An uncharged capacitor is connected in series with a resistor, a dc battery, and an open switch. At time t = 0 s, the switch is closed. Which of the graphs below best describes the charge Q on the capacitor as a function of time t?

Correct AnswerverifiedShow Answer

A resistor, an uncharged capacitor, a dc voltage source, and an open switch are all connected in series. The switch is closed at time t = 0 s. Which one of the following is a correct statement about the circuit?

Correct AnswerverifiedShow Answer

Three resistors of 12 Ω, 12 Ω, and 6.0 Ω are connected together, and an ideal 12-V battery is connected across the combination. What is the current from the battery if they are connected (a) in series or (b) in parallel?

Correct Answerverified(a) 0.40 A...View AnswerShow Answer

A network of capacitors is mostly inside a sealed box, but one capacitor CX is sticking out, as shown in the figure. When you connect a multimeter across points a and b, it reads 27.0 µF. What is CX?

Correct AnswerverifiedShow Answer

Correct AnswerverifiedShow Answer

The capacitive network shown in the figure is assembled with initially uncharged capacitors. Assume that all the quantities in the figure are accurate to two significant figures. The switch S in the network is kept open throughout. What is the total energy stored in the seven capacitors?

Correct AnswerverifiedShow Answer

A system of four capacitors is connected across a 90-V voltage source as shown in the figure. (a) What is the charge on the 4.0-µF capacitor? (b) What is the charge on the 2.0-µF capacitor?

Correct Answerverified(a) 120 µC...View AnswerShow Answer

A multiloop circuit is shown in the figure, but some quantities are not labeled. Find the current I2 if the batteries are ideal. (It is not necessary to solve the entire circuit.)

Correct AnswerverifiedShow Answer

For the circuit shown in the figure, what is the power dissipated in the 2.0-Ω resistor? All the numbers shown are accurate to three significant figures.

Correct AnswerverifiedShow Answer

Correct Answer
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Correct Answer
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Correct Answer
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Correct Answer
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Correct Answer
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Correct Answer
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(a) 1.0 V ...
View Answer

A resistor with a resistance of 360 Ω is in a series circuit with a capacitor of capacitance 7.3 × 10^-6 F. What capacitance must be placed in parallel with the original capacitance to change the capacitive time constant of the combination to three times its original value?

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

A multiloop circuit is shown in the figure. Find the current I₁ if the batteries are ideal. (It is not necessary to solve the entire circuit.)

Correct Answer
verified

Correct Answer
verified

Correct Answer
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Correct Answer
verified
(a) 0.40 A...
View Answer

A network of capacitors is mostly inside a sealed box, but one capacitor C_X is sticking out, as shown in the figure. When you connect a multimeter across points a and b, it reads 27.0 µF. What is C_X?

Correct Answer
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Correct Answer
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Correct Answer
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Correct Answer
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(a) 120 µC...
View Answer

A multiloop circuit is shown in the figure, but some quantities are not labeled. Find the current I₂ if the batteries are ideal. (It is not necessary to solve the entire circuit.)

Correct Answer
verified

Correct Answer
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