Question 1

A 10.0-Ω resistor, 10.0-mH inductor, and 10.0-μF capacitor are connected in series with a 10.0-kHz voltage source. The rms current through the circuit is 0.200 A. Find the rms voltage drop across each of the 3 elements.

Accepted Answer

2.00 V, 12...

Question 2

Suppose the circuit parameters in a series RLC circuit are: L = 1.00 μH, C = 10.0 nF, R = 100 Ω, and the source voltage is 220 V. Determine the resonant frequency of the circuit and the amplitude of the current at resonance.

Accepted Answer

The answer of Suppose the circuit parameters in a series...

Question 3

The voltage 8.00 sin (400t)  is applied to a series RLC circuit, with R = 200 Ω, L = 0.100 H, and C = 1.00 μF. What are the impedance Z and the phase angle θ?

Accepted Answer

A)   200 Ω, −37.0°
B)   566 Ω, +87.0°
C)   2 470 Ω, −85.4°
D)   2 540 Ω, −88.8°
E)   393 Ω, −63.0°F) A) and B)
G) A) and C)

Question 4

The graphs below represent current and voltage phasors at one instant of time. The solid arrows represent the voltage phasors, ΔVmax, and the dashed arrows represent the current phasors, Imax. The graph which shows the correct relationship between current and voltage phasors for a capacitor in an RC circuit is

Accepted Answer

A)  max, and the dashed arrows represent the current phasors, Imax. The graph which shows the correct relationship between current and voltage phasors for a capacitor in an RC circuit is 
A)     
B)     
C)     
D)     
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B)  max, and the dashed arrows represent the current phasors, Imax. The graph which shows the correct relationship between current and voltage phasors for a capacitor in an RC circuit is 
A)     
B)     
C)     
D)     
E)    " class="answers-bank-image d-inline" rel="preload" >
C)  max, and the dashed arrows represent the current phasors, Imax. The graph which shows the correct relationship between current and voltage phasors for a capacitor in an RC circuit is 
A)     
B)     
C)     
D)     
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D)  max, and the dashed arrows represent the current phasors, Imax. The graph which shows the correct relationship between current and voltage phasors for a capacitor in an RC circuit is 
A)     
B)     
C)     
D)     
E)    " class="answers-bank-image d-inline" rel="preload" >
E)  max, and the dashed arrows represent the current phasors, Imax. The graph which shows the correct relationship between current and voltage phasors for a capacitor in an RC circuit is 
A)     
B)     
C)     
D)     
E)    " class="answers-bank-image d-inline" rel="preload" >F) B) and E)
G) B) and D)

Question 5

An ideal step-down transformer has 200 primary turns and 50 secondary turns. If 440 volts (rms)  is placed across the primary, what is the current in the secondary when the load resistance is 7.00 ohms?

Accepted Answer

A)   3.6 A (rms) 
B)   7.3 A (rms) 
C)   11.4 A (rms) 
D)   15.7 A (rms) 
E)   12.4 A (rms) F) B) and D)
G) A) and B)

Question 6

Inductive reactance XL is given by

Accepted Answer

A)   Lω
B)   L/ω
C)   1/Lω
D)   ω/L
E)   ω2LF) A) and C)
G) C) and D)

Question 7

All three circuits shown below have R = 100 Ω, L = 0.1 H and emf ε = (5.0 V)  sin (377 t) . Which statement regarding the angular resonance frequencies ωA, ωB and ωC is correct? A, ωB and ωC is correct?   A)  ωC > ωA = ωB B)  ωC A = ωB C)  ωA = ωB = ωC D)  ωB A = ωC E)  ωB > ωA = ωC" class="answers-bank-image d-inline" rel="preload" >

Accepted Answer

A)   ωC > ωA = ωB
B)   ωC A = ωB
C)   ωA = ωB = ωC
D)   ωB A = ωC
E)   ωB > ωA = ωCF) B) and D)
G) A) and C)

Question 8

In a parallel RLC circuit, where IR = IR, max sin(ωt) , the current through the inductor, IL, is

Accepted Answer

A)   IL = −IL, max sin(ωt) .
B)   IL = IL, max sin(ωt) .
C)   IL = −IL, max cos(ωt) .
D)   IL = IL, max cos(ωt) .
E)   IL = IL, max tan(ωt) .F) All of the above
G) B) and D)

Question 9

Determine the resonant frequency of the circuit.

Accepted Answer

A)   159 Hz
B)   32 Hz
C)   5 Hz
D)   500 Hz
E)   79.5 HzF) A) and B)
G) A) and C)

Question 10

A transformer is to be designed to increase the 30 kV-rms output of a generator to the transmission-line voltage of 345 kV-rms. If the primary winding has 80 turns, how many turns must the secondary have?

Accepted Answer

A)   6
B)   70
C)   920
D)   9200
E)   12F) A) and E)
G) A) and B)

Question 11

Determine the rms voltage drop across the inductor in the circuit.

Accepted Answer

A)   11 V
B)   27.5 V
C)   33 V
D)   38.5 V
E)   30.5 VF) All of the above
G) A) and C)

Question 12

A 60.0-Hz ac generator with a peak voltage of 110 V drives a series RL circuit with R = 10.0 Ω and L = 10.0 mH. The power factor, cos φ, is

Accepted Answer

A)   −1.00.
B)   −0.936.
C)   +0.943.
D)   +0.936.
E)   +1.00.F) B) and E)
G) B) and D)

Question 13

A 60.0-Hz ac generator with a peak voltage of 110 V drives a series RL circuit with R = 10.0 Ω and L = 10.0 mH. The peak current in the circuit is

Accepted Answer

A)   0.963 A.
B)   10.3 A.
C)   11.0 A.
D)   11.9 A.
E)   29.2 A.F) B) and E)
G) None of the above

Question 14

A 2.0-μF capacitor in series with a 2.0-kΩ resistor is connected to a 60-Hz ac source. Calculate the impedance of the circuit.

Accepted Answer

A)   1 500 ohms
B)   1 800 ohms
C)   2 100 ohms
D)   2 400 ohms
E)   8 600 ohmsF) A) and B)
G) None of the above

Question 15

What is the average power dissipation in a series RC circuit if R = 5.00 kΩ, C = 2.00 μF, and V = 170 cos (300t) ?

Accepted Answer

A)   0.930 W
B)   2.60 W
C)   28.2 W
D)   157 W
E)   5.20 WF) A) and D)
G) B) and E)

Question 16

A 60.0-Hz ac generator with a peak voltage of 110 V drives a series RC circuit with R = 10.0 Ω and C = 300 μF. The power factor, cos φ, is

Accepted Answer

A)   −1.00.
B)   −0.749.
C)   +0.749.
D)   +0.834.
E)   +1.00.F) C) and E)
G) B) and E)

Question 17

An ac generator with peak voltage 100 volts is placed across a 10-Ω resistor. What is the average power dissipated?

Accepted Answer

A)   100 W
B)   150 W
C)   500 W
D)   1000 W
E)   2000 WF) C) and D)
G) A) and D)

Question 18

A 10.0-μF capacitor is plugged into a 110 V-rms 60.0-Hz voltage source, with an ammeter in series. What is the rms value of the current through the capacitor?

Accepted Answer

A)   0.202 A (rms) 
B)   0.415 A (rms) 
C)   0.626 A (rms) 
D)   0.838 A (rms) 
E)   0.066 A (rms) F) A) and B)
G) A) and C)

Question 19

A current I = 3 sin (400 t)  amperes flows in a series RL circuit in which L = 1 mH and R = 100Ω. What is the average power loss?

Accepted Answer

A)   225 W
B)   450 W
C)   980 W
D)   1.12 kW
E)   900 WF) B) and C)
G) A) and E)

Question 20

A 0.500-H inductor is connected into a 110 V-rms 60.0-Hz voltage source, with an ammeter in series. What is the rms value of the current through the inductor?

Accepted Answer

A)   0.189 A (rms) 
B)   0.292 A (rms) 
C)   0.584 A (rms) 
D)   1.19 A (rms) 
E)   0.093 A (rms) F) A) and D)
G) A) and B)

Exam 33: Alternating-Current Circuits

An ideal step-down transformer has 200 primary turns and 50 secondary turns. If 440 volts (rms) is placed across the primary, what is the current in the secondary when the load resistance is 7.00 ohms?

Correct Answer
verified

A current I = 3 sin (400 t) amperes flows in a series RL circuit in which L = 1 mH and R = 100Ω. What is the average power loss?

Correct Answer
verified

Determine the rms voltage drop across the inductor in the circuit.

Correct Answer
verified

Suppose the circuit parameters in a series RLC circuit are: L = 1.00 μH, C = 10.0 nF, R = 100 Ω, and the source voltage is 220 V. Determine the resonant frequency of the circuit and the amplitude of the current at resonance.

Correct Answer
verified

A 10.0-μF capacitor is plugged into a 110 V-rms 60.0-Hz voltage source, with an ammeter in series. What is the rms value of the current through the capacitor?

Correct Answer
verified

A 60.0-Hz ac generator with a peak voltage of 110 V drives a series RC circuit with R = 10.0 Ω and C = 300 μF. The power factor, cos φ, is

Correct Answer
verified

The voltage 8.00 sin (400t) is applied to a series RLC circuit, with R = 200 Ω, L = 0.100 H, and C = 1.00 μF. What are the impedance Z and the phase angle θ?

Correct Answer
verified

A transformer is to be designed to increase the 30 kV-rms output of a generator to the transmission-line voltage of 345 kV-rms. If the primary winding has 80 turns, how many turns must the secondary have?

Correct Answer
verified

A 0.500-H inductor is connected into a 110 V-rms 60.0-Hz voltage source, with an ammeter in series. What is the rms value of the current through the inductor?

Correct Answer
verified

All three circuits shown below have R = 100 Ω, L = 0.1 H and emf ε = (5.0 V) sin (377 t) . Which statement regarding the angular resonance frequencies ω_A, ω_B and ω_C is correct?

Correct Answer
verified

In a parallel RLC circuit, where I_R = IR_{, max} sin(ωt) , the current through the inductor, I_L, is

Correct Answer
verified

A 60.0-Hz ac generator with a peak voltage of 110 V drives a series RL circuit with R = 10.0 Ω and L = 10.0 mH. The power factor, cos φ, is

Correct Answer
verified

Correct Answer
verified

An ac generator with peak voltage 100 volts is placed across a 10-Ω resistor. What is the average power dissipated?

Correct Answer
verified

A 10.0-Ω resistor, 10.0-mH inductor, and 10.0-μF capacitor are connected in series with a 10.0-kHz voltage source. The rms current through the circuit is 0.200 A. Find the rms voltage drop across each of the 3 elements.

Correct Answer
verified
2.00 V, 12...
View Answer

Determine the resonant frequency of the circuit.

Correct Answer
verified

What is the average power dissipation in a series RC circuit if R = 5.00 kΩ, C = 2.00 μF, and V = 170 cos (300t) ?

Correct Answer
verified

A 2.0-μF capacitor in series with a 2.0-kΩ resistor is connected to a 60-Hz ac source. Calculate the impedance of the circuit.

Correct Answer
verified

A 60.0-Hz ac generator with a peak voltage of 110 V drives a series RL circuit with R = 10.0 Ω and L = 10.0 mH. The peak current in the circuit is

Correct Answer
verified

Inductive reactance X_L is given by

Correct Answer
verified

Exam 33: Alternating-Current Circuits

An ideal step-down transformer has 200 primary turns and 50 secondary turns. If 440 volts (rms) is placed across the primary, what is the current in the secondary when the load resistance is 7.00 ohms?

Correct AnswerverifiedShow Answer

A current I = 3 sin (400 t) amperes flows in a series RL circuit in which L = 1 mH and R = 100Ω. What is the average power loss?

Correct AnswerverifiedShow Answer

Determine the rms voltage drop across the inductor in the circuit.

Correct AnswerverifiedShow Answer

Suppose the circuit parameters in a series RLC circuit are: L = 1.00 μH, C = 10.0 nF, R = 100 Ω, and the source voltage is 220 V. Determine the resonant frequency of the circuit and the amplitude of the current at resonance.

Correct AnswerverifiedShow Answer

A 10.0-μF capacitor is plugged into a 110 V-rms 60.0-Hz voltage source, with an ammeter in series. What is the rms value of the current through the capacitor?

Correct AnswerverifiedShow Answer

A 60.0-Hz ac generator with a peak voltage of 110 V drives a series RC circuit with R = 10.0 Ω and C = 300 μF. The power factor, cos φ, is

Correct AnswerverifiedShow Answer

The voltage 8.00 sin (400t) is applied to a series RLC circuit, with R = 200 Ω, L = 0.100 H, and C = 1.00 μF. What are the impedance Z and the phase angle θ?

Correct AnswerverifiedShow Answer

A transformer is to be designed to increase the 30 kV-rms output of a generator to the transmission-line voltage of 345 kV-rms. If the primary winding has 80 turns, how many turns must the secondary have?

Correct AnswerverifiedShow Answer

A 0.500-H inductor is connected into a 110 V-rms 60.0-Hz voltage source, with an ammeter in series. What is the rms value of the current through the inductor?

Correct AnswerverifiedShow Answer

All three circuits shown below have R = 100 Ω, L = 0.1 H and emf ε = (5.0 V) sin (377 t) . Which statement regarding the angular resonance frequencies ωA, ωB and ωC is correct?

Correct AnswerverifiedShow Answer

In a parallel RLC circuit, where IR = IR, max sin(ωt) , the current through the inductor, IL, is

Correct AnswerverifiedShow Answer

A 60.0-Hz ac generator with a peak voltage of 110 V drives a series RL circuit with R = 10.0 Ω and L = 10.0 mH. The power factor, cos φ, is

Correct AnswerverifiedShow Answer

Correct AnswerverifiedShow Answer

An ac generator with peak voltage 100 volts is placed across a 10-Ω resistor. What is the average power dissipated?

Correct AnswerverifiedShow Answer

A 10.0-Ω resistor, 10.0-mH inductor, and 10.0-μF capacitor are connected in series with a 10.0-kHz voltage source. The rms current through the circuit is 0.200 A. Find the rms voltage drop across each of the 3 elements.

Correct Answerverified2.00 V, 12...View AnswerShow Answer

Determine the resonant frequency of the circuit.

Correct AnswerverifiedShow Answer

What is the average power dissipation in a series RC circuit if R = 5.00 kΩ, C = 2.00 μF, and V = 170 cos (300t) ?

Correct AnswerverifiedShow Answer

A 2.0-μF capacitor in series with a 2.0-kΩ resistor is connected to a 60-Hz ac source. Calculate the impedance of the circuit.

Correct AnswerverifiedShow Answer

A 60.0-Hz ac generator with a peak voltage of 110 V drives a series RL circuit with R = 10.0 Ω and L = 10.0 mH. The peak current in the circuit is

Correct AnswerverifiedShow Answer

Inductive reactance XL is given by

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
verified

Correct Answer
verified

Correct Answer
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Correct Answer
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Correct Answer
verified

All three circuits shown below have R = 100 Ω, L = 0.1 H and emf ε = (5.0 V) sin (377 t) . Which statement regarding the angular resonance frequencies ω_A, ω_B and ω_C is correct?

Correct Answer
verified

In a parallel RLC circuit, where I_R = IR_{, max} sin(ωt) , the current through the inductor, I_L, is

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
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Correct Answer
verified
2.00 V, 12...
View Answer

Correct Answer
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Correct Answer
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Correct Answer
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Correct Answer
verified

Inductive reactance X_L is given by

Correct Answer
verified