Question 1

In the circuit shown in the figure, two 360.0-Ω resistors are connected in series with an ideal source of emf. A voltmeter with internal resistance of 6350 Ω is connected across one of the resistors and reads 3.23 V. Find the emf of the source.

Accepted Answer

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

Question 2

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 galvanometerF) A) and B)
G) B) and E)

Question 3

For the circuit shown in the figure, what is the current through resistor R1? 1?   A)  0.071 A B)  0.13 A C)  0.029 A D)  0.016 A" class="answers-bank-image d-inline" rel="preload" >

Accepted Answer

A)   0.071 A
B)   0.13 A
C)   0.029 A
D)   0.016 AE) A) and D)
F) All of the above

Question 4

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)   5F) B) and E)
G) C) and D)

Question 5

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 nJE) B) and C)
F) A) and C) A

Question 6

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 VE) A) and D)
F) All of the above

Question 7

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

(a) 36.0 Ω
(b) 2.40 Ω
(c)Connect the 8....

Question 8

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 sF) A) and C)
G) None of the above

Question 9

An uncharged 30.0-µF capacitor is connected in series with a 25.0-Ω resistor, a DC battery, and an open switch. The battery has an internal resistance of 10.0 Ω and the open-circuit voltage across its terminals is 50.0 V. The leads have no appreciable resistance. At time t = 0, the switch is suddenly closed.
(a) What is the maximum current through the 25.0-Ω resistor and when does it occur (immediately after closing the switch or after the switch has been closed for a long time)?
(b) What is the maximum charge that the capacitor receives?
(c) When the current in the circuit is 0.850 A, how much charge is on the plates of the capacitor?

Accepted Answer

(a) 1.43 A, immediat...

Question 10

When a 20.0-ohm resistor is connected across the terminals of a 12.0-V battery, the voltage across the terminals of the battery falls by 0.300 V. What is the internal resistance of this battery?

Accepted Answer

A)   3.60 Ω
B)   1.56 Ω
C)   0.98 Ω
D)   0.30 Ω
E)   0.51 ΩF) A) and B)
G) A) and C)

Question 11

The emf and the internal resistance of a battery are as shown in the figure. If a current of 8.3 A is drawn from the battery when a resistor R is connected across the terminals ab of the battery, what is the power dissipated by the resistor R?

Accepted Answer

A)   440 W
B)   700 W
C)   620 W
D)   530 W
E)   790 WF) A) and B)
G) C) and E)

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

(a) 0.83 A 
(b) 0.53 A 
(c)0.30 A

Question 13

Two unknown resistors are connected together. When they are connected in series their equivalent resistance is 15 Ω. When they are connected in parallel, their equivalent resistance is 3.3 Ω. What are the resistances of these resistors?

Accepted Answer

The answer of Two unknown resistors are connected together. When...

Question 14

For the circuit shown in the figure, the switch S is initially open and the capacitor voltage is 80 V. The switch is then closed at time t = 0. How long after closing the switch will the current in the resistor be 7.0 µA?

Accepted Answer

A)   87 s
B)   95 s
C)   78 s
D)   69 s
E)   61 sF) A) and C)
G) A) and D)

Question 15

A galvanometer coil having a resistance of 20 Ω and a full-scale deflection at 1.0 mA is connected in series with a 4980 Ω resistance to build a voltmeter. What is the maximum voltage that this voltmeter can read?

Accepted Answer

A)   3.0 V
B)   1.0 V
C)   50 V
D)   5.0 V
E)   10 VF) None of the above
G) A) and E) D

Question 16

A 4.0-mF capacitor is discharged through a 4.0-kΩ resistor. How long will it take for the capacitor to lose half its initial stored energy?

Accepted Answer

A)   9.2 s
B)   2.7 s
C)   10.2 s
D)   5.5 s
E)   1.6 sF) B) and C)
G) A) and E)

Question 17

For the circuit shown in the figure, what is the current through resistor R3? 3?   A)  0.043 A B)  1.5 A C)  0.028 A D)  0.086 A" class="answers-bank-image d-inline" rel="preload" >

Accepted Answer

A)   0.043 A
B)   1.5 A
C)   0.028 A
D)   0.086 AE) A) and B)
F) C) and D)

Question 18

The voltage and power ratings of a particular light bulb, which are its normal operating values, are 110 V and 60 W. Assume the resistance of the filament of the bulb is constant and is independent of operating conditions. If the light bulb is operated at a reduced voltage and the power drawn by the bulb is 36 W, what is the operating voltage of the bulb?

Accepted Answer

A)   66 V
B)   72 V
C)   78 V
D)   85 V
E)   90 VF) D) and E)
G) A) and E)

Question 19

The resistivity of gold is 2.44 × 10-8 Ω ∙ m at room temperature. A gold wire that is 1.8 mm in diameter and 11 cm long carries a current of 170 mA. How much power is dissipated in the wire?

Accepted Answer

A)   0.030 mW
B)   0.0076 mW
C)   0.013 mW
D)   0.019 mW
E)   0.025 mWF) B) and E)
G) A) and D)

Question 20

A light bulb is connected in the circuit shown in the figure with the switch S open. All the connecting leads have no appreciable resistance and the battery has no internal resistance. When we close the switch, which statements below accurately describe the behavior of the circuit? (There may be more than one correct choice.)  2 will decrease. E)  The potential drop across R2 will not change." class="answers-bank-image d-inline" rel="preload" >

Accepted Answer

A)   The brightness of the bulb will increase.
B)   The brightness of the bulb will decrease.
C)   The brightness of the bulb will not change.
D)   The potential drop across R2 will decrease.
E)   The potential drop across R2 will not change.F) B) and D)
G) B) and C)

Exam 31: Fundamentals of Circuits

In the circuit shown in the figure, two 360.0-Ω resistors are connected in series with an ideal source of emf. A voltmeter with internal resistance of 6350 Ω is connected across one of the resistors and reads 3.23 V. Find the emf of the source.

Correct Answer
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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?

Correct Answer
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For the circuit shown in the figure, what is the current through resistor R₁?

Correct Answer
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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?

Correct Answer
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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?

Correct Answer
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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?

Correct Answer
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Correct Answer
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(a) 36.0 Ω
(b) 2.40 Ω
(c)Connect the 8....
View Answer

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?

Correct Answer
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Correct Answer
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(a) 1.43 A, immediat...
View Answer

When a 20.0-ohm resistor is connected across the terminals of a 12.0-V battery, the voltage across the terminals of the battery falls by 0.300 V. What is the internal resistance of this battery?

Correct Answer
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The emf and the internal resistance of a battery are as shown in the figure. If a current of 8.3 A is drawn from the battery when a resistor R is connected across the terminals ab of the battery, what is the power dissipated by the resistor R?

Correct Answer
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Correct Answer
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(a) 0.83 A (b) 0.53 A (c)0.30 A

Two unknown resistors are connected together. When they are connected in series their equivalent resistance is 15 Ω. When they are connected in parallel, their equivalent resistance is 3.3 Ω. What are the resistances of these resistors?

Correct Answer
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For the circuit shown in the figure, the switch S is initially open and the capacitor voltage is 80 V. The switch is then closed at time t = 0. How long after closing the switch will the current in the resistor be 7.0 µA?

Correct Answer
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A galvanometer coil having a resistance of 20 Ω and a full-scale deflection at 1.0 mA is connected in series with a 4980 Ω resistance to build a voltmeter. What is the maximum voltage that this voltmeter can read?

Correct Answer
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D

A 4.0-mF capacitor is discharged through a 4.0-kΩ resistor. How long will it take for the capacitor to lose half its initial stored energy?

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

Correct Answer
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Correct Answer
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The resistivity of gold is 2.44 × 10^-8 Ω ∙ m at room temperature. A gold wire that is 1.8 mm in diameter and 11 cm long carries a current of 170 mA. How much power is dissipated in the wire?

Correct Answer
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Correct Answer
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Exam 31: Fundamentals of Circuits

In the circuit shown in the figure, two 360.0-Ω resistors are connected in series with an ideal source of emf. A voltmeter with internal resistance of 6350 Ω is connected across one of the resistors and reads 3.23 V. Find the emf of the source.

Correct AnswerverifiedShow Answer

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?

Correct AnswerverifiedShow Answer

For the circuit shown in the figure, what is the current through resistor R1?

Correct AnswerverifiedShow Answer

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?

Correct AnswerverifiedShow Answer

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?

Correct AnswerverifiedA

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?

Correct AnswerverifiedShow Answer

Correct Answerverified(a) 36.0 Ω (b) 2.40 Ω(c)Connect the 8....View AnswerShow Answer

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?

Correct AnswerverifiedShow Answer

Correct Answerverified(a) 1.43 A, immediat...View AnswerShow Answer

When a 20.0-ohm resistor is connected across the terminals of a 12.0-V battery, the voltage across the terminals of the battery falls by 0.300 V. What is the internal resistance of this battery?

Correct AnswerverifiedShow Answer

The emf and the internal resistance of a battery are as shown in the figure. If a current of 8.3 A is drawn from the battery when a resistor R is connected across the terminals ab of the battery, what is the power dissipated by the resistor R?

Correct AnswerverifiedShow Answer

Correct Answerverified(a) 0.83 A (b) 0.53 A (c)0.30 A

Two unknown resistors are connected together. When they are connected in series their equivalent resistance is 15 Ω. When they are connected in parallel, their equivalent resistance is 3.3 Ω. What are the resistances of these resistors?

Correct AnswerverifiedShow Answer

For the circuit shown in the figure, the switch S is initially open and the capacitor voltage is 80 V. The switch is then closed at time t = 0. How long after closing the switch will the current in the resistor be 7.0 µA?

Correct AnswerverifiedShow Answer

A galvanometer coil having a resistance of 20 Ω and a full-scale deflection at 1.0 mA is connected in series with a 4980 Ω resistance to build a voltmeter. What is the maximum voltage that this voltmeter can read?

Correct AnswerverifiedD

A 4.0-mF capacitor is discharged through a 4.0-kΩ resistor. How long will it take for the capacitor to lose half its initial stored energy?

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

Correct AnswerverifiedShow Answer

The resistivity of gold is 2.44 × 10-8 Ω ∙ m at room temperature. A gold wire that is 1.8 mm in diameter and 11 cm long carries a current of 170 mA. How much power is dissipated in the wire?

Correct AnswerverifiedShow Answer

Correct AnswerverifiedShow Answer

Correct Answer
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Correct Answer
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For the circuit shown in the figure, what is the current through resistor R₁?

Correct Answer
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Correct Answer
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Correct Answer
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A

Correct Answer
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Correct Answer
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(a) 36.0 Ω
(b) 2.40 Ω
(c)Connect the 8....
View Answer

Correct Answer
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Correct Answer
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(a) 1.43 A, immediat...
View Answer

Correct Answer
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Correct Answer
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Correct Answer
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(a) 0.83 A (b) 0.53 A (c)0.30 A

Correct Answer
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Correct Answer
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Correct Answer
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D

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

Correct Answer
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Correct Answer
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The resistivity of gold is 2.44 × 10^-8 Ω ∙ m at room temperature. A gold wire that is 1.8 mm in diameter and 11 cm long carries a current of 170 mA. How much power is dissipated in the wire?

Correct Answer
verified

Correct Answer
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