Question 1

The graph shows the voltage across and the current through a single circuit element connected to an ac generator. 
-Identify the circuit element.

Accepted Answer

A)  The element is a 25-  Ω\OmegaΩ resistor.
B)  The element is a 35-  Ω\OmegaΩ  resistor.
C)  The element is a 0.45-H inductor.
D)  The element is a 360-µF capacitor.
E)  The element is a 510-µF capacitor. F) B) and D)
G) B) and E)

Question 2

An ac generator supplies a peak (not rms)  voltage of 120.0 V at 60.0 Hz.It is connected in series with a 50.0-  Ω\OmegaΩ  resistor and a 0.500-H inductor.
-What is the rms voltage of the generator?

Accepted Answer

A)  84.9 V
B)  138 V
C)  151 V
D)  169 V
E)  240 V F) B) and C)
G) B) and D)

Question 3

A variable inductor is connected to an ac source.What effect does increasing the inductance have on the reactance and current in this circuit?

Accepted Answer

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

Question 4

In an ac circuit, a 0.055-H inductor is connected to a generator that has an rms voltage of 18 V and operates at 50.0 Hz.What is the rms current through the inductor?

Accepted Answer

A)  0.62 A
B)  2.0 A
C)  3.2 A
D)  1.0 A
E)  14 AF) A) and C)
G) C) and E)

Question 5

The voltage across and the current through a single circuit element connected to an ac generator are shown in the graph. 
-Note the following circuit elements: (1)  resistors, (2)  capacitors, and (3)  inductors.Which of these elements uses no energy, on average, in an ac circuit?

Accepted Answer

A)  1 only
B)  2 only
C)  3 only
D)  both 2 and 3
E)  both 1 and 3F) A) and B)
G) A) and C) D

Question 6

An ac generator supplies a peak (not rms)  voltage of 150 V at 60.0 Hz.The generator is connected in series with a 35-mH inductor, a 45-µF capacitor and an 85-  Ω\OmegaΩ  resistor.
-Determine the rms current in the circuit.

Accepted Answer

A)  0.28 A
B)  0.40 A
C)  0.75 A
D)  1.1 A
E)  1.6 A F) A) and E)
G) B) and C)

Question 7

An ac generator supplies an rms (not peak)  voltage of 180 V at 60.0 Hz.The generator is connected in series with a 0.50-H inductor, a 6.0-µF capacitor and a 300-  Ω\OmegaΩ  resistor.
-What is the impedance of the circuit?

Accepted Answer

A)  150   Ω\OmegaΩ 
B)  190   Ω\OmegaΩ 
C)  360   Ω\OmegaΩ 
D)  390   Ω\OmegaΩ 
E)  440   Ω\OmegaΩF) None of the above
G) A) and B)

Question 8

An ac generator supplies a peak (not rms)  voltage of 150 V at 60.0 Hz.The generator is connected in series with a 35-mH inductor, a 45-µF capacitor and an 85-  Ω\OmegaΩ  resistor.
-Which one of the following statements concerning this circuit is true?

Accepted Answer

A)  The voltage leads the current.
B)  The circuit is more capacitive than inductive.
C)  The voltage and current are exactly out of phase.
D)  The voltage and current are in phase.
E)  The phase angle for this circuit is positive. F) A) and B)
G) A) and C)

Question 9

An ac circuit consists of a series combination of an inductor and a capacitor.What is the phase angle between the voltages across these two circuit elements?

Accepted Answer

A)  0°
B)  90°
C)  180°
D)  270°
E)  360°F) A) and B)
G) B) and E)

Question 10

An ac generator supplies an rms (not peak)  voltage of 180 V at 60.0 Hz.The generator is connected in series with a 0.50-H inductor, a 6.0-µF capacitor and a 300-  Ω\OmegaΩ  resistor.
-What is the peak (not rms)  voltage across the capacitor?

Accepted Answer

A)  120 V
B)  180 V
C)  190 V
D)  210 V
E)  290 V F) A) and E)
G) C) and D)

Question 11

An oscillating LC circuit has a resonant frequency of 1.2 × 106 Hz.The diagram shows the system at t = 0 s when there is no charge on the capacitor and the current is in the direction shown.At this time, the energy stored in the inductor is 2.5 × 10-7 J. 6 Hz.The diagram shows the system at t = 0 s when there is no charge on the capacitor and the current is in the direction shown.At this time, the energy stored in the inductor is 2.5 × 10-7 J.   -Determine the numerical value of the capacitance. A) 2.4 × 10-11 F B) 3.6 × 10-11 F C) 4.4 × 10-11 F D) 6.8 × 10-11 F E) 8.8 × 10-11 F" class="answers-bank-image d-inline" rel="preload" >
-Determine the numerical value of the capacitance.

Accepted Answer

A)  2.4 × 10-11 F
B)  3.6 × 10-11 F
C)  4.4 × 10-11 F
D)  6.8 × 10-11 F
E)  8.8 × 10-11 FF) B) and D)
G) B) and C)

Question 12

Which one of the following graphs shows how the inductive reactance varies with frequency?

Accepted Answer

A)  a
B)  b
C)  c
D)  d
E)  eF) C) and E)
G) D) and E)

Question 13

The table below shows the values of the resistance, capacitive reactance and inductive reactance for five RCL circuits.In which circuit will the voltage lead the current?

Accepted Answer

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

Question 14

The reactance of a capacitor in a circuit at 110 Hz is 35   Ω\OmegaΩ .Determine the capacitance.

Accepted Answer

A)  41 µF
B)  260 µF
C)  51 mF
D)  0.10 F
E)  0.31 F F) B) and D)
G) B) and E)

Question 15

An ac generator supplies an rms (not peak)  voltage of 180 V at 60.0 Hz.The generator is connected in series with a 0.50-H inductor, a 6.0-µF capacitor and a 300-  Ω\OmegaΩ  resistor.
-What is the peak (not rms)  voltage across the inductor?

Accepted Answer

A)  120 V
B)  180 V
C)  190 V
D)  260 V
E)  290 V F) None of the above
G) B) and E)

Question 16

The graph shows the voltage across and the current through a single circuit element connected to an ac generator. 
-What is the reactance of this element?

Accepted Answer

A)  20   Ω\OmegaΩ 
B)  25   Ω\OmegaΩ 
C)  30   Ω\OmegaΩ 
D)  35   Ω\OmegaΩ 
E)  40  Ω\OmegaΩF) A) and C)
G) A) and B)

Question 17

The graph shows the impedance as a function of frequency for a series RCL circuit.At what frequency does the capacitor make the largest contribution? 1 B) f2 C) f3 D) f1 or f3 E) f1 or f2 or f3" class="answers-bank-image d-inline" rel="preload" >

Accepted Answer

A)  f1
B)  f2
C)  f3
D)  f1 or f3
E)  f1 or f2 or f3F) C) and D)
G) A) and D) A

Question 18

An ac generator supplies a peak (not rms)  voltage of 120.0 V at 60.0 Hz.It is connected in series with a 50.0-  Ω\OmegaΩ  resistor and a 0.500-H inductor.
-What is the peak current through the resistor?

Accepted Answer

A)  2.40 A
B)  1.71 A
C)  1.33 A
D)  0.617 A
E)  0.437 A F) All of the above
G) A) and B) D

Question 19

Which one of the following graphs illustrates how capacitive reactance varies with frequency?

Accepted Answer

A)  a
B)  b
C)  c
D)  d
E)  eF) B) and D)
G) All of the above

Question 20

For which one of the following circuit arrangements will the power factor be non-zero?

Accepted Answer

A)  a capacitor in series with an ac generator
B)  an inductor in series with an ac generator
C)  two capacitors in series with an ac generator
D)  a capacitor and resistor in series with an ac generator
E)  a capacitor and inductor in series with an ac generatorF) B) and C)
G) C) and D)

Exam 23: Alternating Current Circuits

Correct Answer
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An ac generator supplies a peak (not rms) voltage of 120.0 V at 60.0 Hz.It is connected in series with a 50.0- $\Omega$ resistor and a 0.500-H inductor. -What is the rms voltage of the generator?

Correct Answer
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A variable inductor is connected to an ac source.What effect does increasing the inductance have on the reactance and current in this circuit?

Correct Answer
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In an ac circuit, a 0.055-H inductor is connected to a generator that has an rms voltage of 18 V and operates at 50.0 Hz.What is the rms current through the inductor?

Correct Answer
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The voltage across and the current through a single circuit element connected to an ac generator are shown in the graph. -Note the following circuit elements: (1) resistors, (2) capacitors, and (3) inductors.Which of these elements uses no energy, on average, in an ac circuit?

Correct Answer
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D

An ac generator supplies a peak (not rms) voltage of 150 V at 60.0 Hz.The generator is connected in series with a 35-mH inductor, a 45-µF capacitor and an 85- $\Omega$ resistor. -Determine the rms current in the circuit.

Correct Answer
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An ac generator supplies an rms (not peak) voltage of 180 V at 60.0 Hz.The generator is connected in series with a 0.50-H inductor, a 6.0-µF capacitor and a 300- $\Omega$ resistor. -What is the impedance of the circuit?

Correct Answer
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An ac generator supplies a peak (not rms) voltage of 150 V at 60.0 Hz.The generator is connected in series with a 35-mH inductor, a 45-µF capacitor and an 85- $\Omega$ resistor. -Which one of the following statements concerning this circuit is true?

Correct Answer
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An ac circuit consists of a series combination of an inductor and a capacitor.What is the phase angle between the voltages across these two circuit elements?

Correct Answer
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An ac generator supplies an rms (not peak) voltage of 180 V at 60.0 Hz.The generator is connected in series with a 0.50-H inductor, a 6.0-µF capacitor and a 300- $\Omega$ resistor. -What is the peak (not rms) voltage across the capacitor?

Correct Answer
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Correct Answer
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Which one of the following graphs shows how the inductive reactance varies with frequency?

Correct Answer
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The table below shows the values of the resistance, capacitive reactance and inductive reactance for five RCL circuits.In which circuit will the voltage lead the current?

Correct Answer
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The reactance of a capacitor in a circuit at 110 Hz is 35 $\Omega$ .Determine the capacitance.

Correct Answer
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An ac generator supplies an rms (not peak) voltage of 180 V at 60.0 Hz.The generator is connected in series with a 0.50-H inductor, a 6.0-µF capacitor and a 300- $\Omega$ resistor. -What is the peak (not rms) voltage across the inductor?

Correct Answer
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Correct Answer
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The graph shows the impedance as a function of frequency for a series RCL circuit.At what frequency does the capacitor make the largest contribution?

Correct Answer
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A

An ac generator supplies a peak (not rms) voltage of 120.0 V at 60.0 Hz.It is connected in series with a 50.0- $\Omega$ resistor and a 0.500-H inductor. -What is the peak current through the resistor?

Correct Answer
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D

Which one of the following graphs illustrates how capacitive reactance varies with frequency?

Correct Answer
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For which one of the following circuit arrangements will the power factor be non-zero?

Correct Answer
verified

Exam 23: Alternating Current Circuits

The graph shows the voltage across and the current through a single circuit element connected to an ac generator. -Identify the circuit element.

Correct AnswerverifiedShow Answer

An ac generator supplies a peak (not rms) voltage of 120.0 V at 60.0 Hz.It is connected in series with a 50.0- Ω\OmegaΩ resistor and a 0.500-H inductor. -What is the rms voltage of the generator?

Correct AnswerverifiedShow Answer

A variable inductor is connected to an ac source.What effect does increasing the inductance have on the reactance and current in this circuit?

Correct AnswerverifiedShow Answer

In an ac circuit, a 0.055-H inductor is connected to a generator that has an rms voltage of 18 V and operates at 50.0 Hz.What is the rms current through the inductor?

Correct AnswerverifiedShow Answer

The voltage across and the current through a single circuit element connected to an ac generator are shown in the graph. -Note the following circuit elements: (1) resistors, (2) capacitors, and (3) inductors.Which of these elements uses no energy, on average, in an ac circuit?

Correct AnswerverifiedD

An ac generator supplies a peak (not rms) voltage of 150 V at 60.0 Hz.The generator is connected in series with a 35-mH inductor, a 45-µF capacitor and an 85- Ω\OmegaΩ resistor. -Determine the rms current in the circuit.

Correct AnswerverifiedShow Answer

An ac generator supplies an rms (not peak) voltage of 180 V at 60.0 Hz.The generator is connected in series with a 0.50-H inductor, a 6.0-µF capacitor and a 300- Ω\OmegaΩ resistor. -What is the impedance of the circuit?

Correct AnswerverifiedShow Answer

An ac generator supplies a peak (not rms) voltage of 150 V at 60.0 Hz.The generator is connected in series with a 35-mH inductor, a 45-µF capacitor and an 85- Ω\OmegaΩ resistor. -Which one of the following statements concerning this circuit is true?

Correct AnswerverifiedShow Answer

An ac circuit consists of a series combination of an inductor and a capacitor.What is the phase angle between the voltages across these two circuit elements?

Correct AnswerverifiedShow Answer

An ac generator supplies an rms (not peak) voltage of 180 V at 60.0 Hz.The generator is connected in series with a 0.50-H inductor, a 6.0-µF capacitor and a 300- Ω\OmegaΩ resistor. -What is the peak (not rms) voltage across the capacitor?

Correct AnswerverifiedShow Answer

Correct AnswerverifiedShow Answer

Which one of the following graphs shows how the inductive reactance varies with frequency?

Correct AnswerverifiedShow Answer

The table below shows the values of the resistance, capacitive reactance and inductive reactance for five RCL circuits.In which circuit will the voltage lead the current?

Correct AnswerverifiedShow Answer

The reactance of a capacitor in a circuit at 110 Hz is 35 Ω\OmegaΩ .Determine the capacitance.

Correct AnswerverifiedShow Answer

An ac generator supplies an rms (not peak) voltage of 180 V at 60.0 Hz.The generator is connected in series with a 0.50-H inductor, a 6.0-µF capacitor and a 300- Ω\OmegaΩ resistor. -What is the peak (not rms) voltage across the inductor?

Correct AnswerverifiedShow Answer

The graph shows the voltage across and the current through a single circuit element connected to an ac generator. -What is the reactance of this element?

Correct AnswerverifiedShow Answer

The graph shows the impedance as a function of frequency for a series RCL circuit.At what frequency does the capacitor make the largest contribution?

Correct AnswerverifiedA

An ac generator supplies a peak (not rms) voltage of 120.0 V at 60.0 Hz.It is connected in series with a 50.0- Ω\OmegaΩ resistor and a 0.500-H inductor. -What is the peak current through the resistor?

Correct AnswerverifiedD

Which one of the following graphs illustrates how capacitive reactance varies with frequency?

Correct AnswerverifiedShow Answer

For which one of the following circuit arrangements will the power factor be non-zero?

Correct AnswerverifiedShow Answer

Correct Answer
verified

An ac generator supplies a peak (not rms) voltage of 120.0 V at 60.0 Hz.It is connected in series with a 50.0- $\Omega$ resistor and a 0.500-H inductor. -What is the rms voltage of the generator?

Correct Answer
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Correct Answer
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Correct Answer
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Correct Answer
verified
D

An ac generator supplies a peak (not rms) voltage of 150 V at 60.0 Hz.The generator is connected in series with a 35-mH inductor, a 45-µF capacitor and an 85- $\Omega$ resistor. -Determine the rms current in the circuit.

Correct Answer
verified

An ac generator supplies an rms (not peak) voltage of 180 V at 60.0 Hz.The generator is connected in series with a 0.50-H inductor, a 6.0-µF capacitor and a 300- $\Omega$ resistor. -What is the impedance of the circuit?

Correct Answer
verified

An ac generator supplies a peak (not rms) voltage of 150 V at 60.0 Hz.The generator is connected in series with a 35-mH inductor, a 45-µF capacitor and an 85- $\Omega$ resistor. -Which one of the following statements concerning this circuit is true?

Correct Answer
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Correct Answer
verified

An ac generator supplies an rms (not peak) voltage of 180 V at 60.0 Hz.The generator is connected in series with a 0.50-H inductor, a 6.0-µF capacitor and a 300- $\Omega$ resistor. -What is the peak (not rms) voltage across the capacitor?

Correct Answer
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Correct Answer
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Correct Answer
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Correct Answer
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The reactance of a capacitor in a circuit at 110 Hz is 35 $\Omega$ .Determine the capacitance.

Correct Answer
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An ac generator supplies an rms (not peak) voltage of 180 V at 60.0 Hz.The generator is connected in series with a 0.50-H inductor, a 6.0-µF capacitor and a 300- $\Omega$ resistor. -What is the peak (not rms) voltage across the inductor?

Correct Answer
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Correct Answer
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Correct Answer
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A

An ac generator supplies a peak (not rms) voltage of 120.0 V at 60.0 Hz.It is connected in series with a 50.0- $\Omega$ resistor and a 0.500-H inductor. -What is the peak current through the resistor?

Correct Answer
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D

Correct Answer
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Correct Answer
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