Question 1

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

Accepted Answer

A)  55 V
B)  77 V
C)  9.9 V
D)  5.5 V
E)  61 VF) A) and B)
G) B) and E) A

Question 2

An alternating current circuit has resistance R, inductance L, and capacitance C in series with a voltage source. Which statement is correct?

Accepted Answer

A)  The voltage across the capacitor leads the voltage across the inductor by 90°.
B)  The voltage across the inductor leads the voltage across the capacitor by 90°.
C)  The voltage across the inductor leads the voltage across the resistor by 180°.
D)  The voltage across the inductor is out of phase with the voltage across the capacitor by 180°.
E)  Both voltages lead the voltage across the resistor by 90°.F) A) and D)
G) B) and D)

Question 3

Calculate Vout/Vin for the circuit if R = 2.0 kΩ, C = 0.020 μF and V = 140 V sin(50,000t) . ​  ​

Accepted Answer

A)  0.02
B)  0.45
C)  0.80
D)  0.98
E)  2.2F) B) and E)
G) C) and D)

Question 4

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 5

A series LC circuit contains a 100-mH inductor, a 36.0-mF capacitor and a 12-V battery. The period of the electromagnetic oscillations in the circuit is

Accepted Answer

A)  0.0227 s.
B)  0.377 s.
C)  2.26 s.
D)  105 s.
E)  1750 s.F) C) and D)
G) A) and C)

Question 6

What is the average power dissipation in an RLC series circuit with R = 10 Ω, L = 0.1 H, C = 10 μF when driven at resonance by a 100 V rms source?

Accepted Answer

A)  100 W
B)  500 W
C)  1000 W
D)  2 kW
E)  700 WF) A) and E)
G) A) and D)

Question 7

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 C)
G) A) and B)

Question 8

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) B) and D)
G) A) and D)

Question 9

For driving voltage  , the current through the resistor is ​
​  ​

Accepted Answer

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

Question 10

There is no current in the circuit shown in the figure below until the switch is closed. The current through the 20-Ω resistor the instant after the switch is closed is either [1] 15 A or [2] 5.0 A, and the current through the 20-Ω resistor after the switch has been closed a long time is either [3] 5.0 A or [4] 15 A. Which combination of the above choices is correct?

Accepted Answer

A)  [1] and [3]
B)  [1] and [4]
C)  [2] and [3]
D)  [2] and [4]
E)  None of theseF) A) and B)
G) B) and C)

Question 11

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 D)
G) B) and E)

Question 12

After a switch is thrown to remove the battery from a DC LR circuit, but the circuit is still left complete, the time constant represents

Accepted Answer

A)  the time rate of change of the current in the circuit.
B)  the time rate of change of the induced emf in the circuit.
C)  the magnitude of the ratio of the current to the time rate of change of the current.
D)  all of the above.
E)  only (a)  and (b)  above.F) A) and D)
G) D) and E)

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 impedance is

Accepted Answer

A)  3.77 Ω.
B)  9.26 Ω.
C)  10.0 Ω.
D)  10.7 Ω.
E)  13.8 Ω.F) A) and C)
G) C) and D)

Question 14

A circuit contains two inductors of 6.0-mH inductance in series placed in parallel with an inductor of 8.0-mH inductance. After one of the 6.0-mH inductors burns out, the repair person wants to replace all three inductors with one inductor of equivalent inductance. Assuming inductors combine in series and parallel the same way resistors do, what inductance should she use?

Accepted Answer

A)  3.0 mH
B)  3.4 mH
C)  4.8 mH
D)  11 mH
E)  20 mHF) A) and C)
G) A) and D)

Question 15

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)  2470 Ω, −85.4°
D)  2540 Ω, −88.8°
E)  393 Ω, −63.0°F) A) and E)
G) C) and D)

Question 16

A series LC circuit contains a 100-mH inductor, a 36.0-mF capacitor and a 12-V battery. The frequency of the electromagnetic oscillations in the circuit is

Accepted Answer

A)  5.73 × 10−4 Hz.
B)  9.55 × 10−3 Hz.
C)  0.442 Hz.
D)  2.65 Hz.
E)  44.0 Hz.F) A) and D)
G) A) and E)

Question 17

At what frequency will a 12-μF capacitor have a reactance XC = 300 Ω?

Accepted Answer

A)  44 Hz
B)  88 Hz
C)  180 Hz
D)  350 Hz
E)  280 HzF) A) and E)
G) None of the above

Question 18

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)  1500 ohms
B)  1800 ohms
C)  2100 ohms
D)  2400 ohms
E)  8600 ohmsF) B) and E)
G) All of the above

Question 19

Which of the following are the units of a henry and a farad, respectively?

Accepted Answer

A)  J ⋅ s2/C2 and C2/J
B)  V ⋅ s/A and V/C
C)  V/(A ⋅ s)  and C/V
D)  N ⋅ m/A2 and 1/J
E)  None of the aboveF) C) and D)
G) B) and D) A

Question 20

Whenever the alternating current frequency in a series RLC circuit is halved,

Accepted Answer

A)  the inductive reactance is doubled and the capacitive reactance is halved.
B)  the inductive reactance is doubled and the capacitive reactance is doubled.
C)  the inductive reactance is halved and the capacitive reactance is halved.
D)  the inductive reactance is halved and the capacitive reactance is doubled.
E)  the reactance of the circuit remains the same.F) C) and D)
G) A) and B)

Exam 33: Inductors and Ac Circuits

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

Correct Answer
verified
A

An alternating current circuit has resistance R, inductance L, and capacitance C in series with a voltage source. Which statement is correct?

Correct Answer
verified

Calculate Vout/Vin for the circuit if R = 2.0 kΩ, C = 0.020 μF and V = 140 V sin(50,000t) .

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 series LC circuit contains a 100-mH inductor, a 36.0-mF capacitor and a 12-V battery. The period of the electromagnetic oscillations in the circuit is

Correct Answer
verified

What is the average power dissipation in an RLC series circuit with R = 10 Ω, L = 0.1 H, C = 10 μF when driven at resonance by a 100 V rms source?

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

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

For driving voltage , the current through the resistor is

Correct Answer
verified
E

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

After a switch is thrown to remove the battery from a DC LR circuit, but the circuit is still left complete, the time constant represents

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 impedance is

Correct Answer
verified

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 series LC circuit contains a 100-mH inductor, a 36.0-mF capacitor and a 12-V battery. The frequency of the electromagnetic oscillations in the circuit is

Correct Answer
verified

At what frequency will a 12-μF capacitor have a reactance XC = 300 Ω?

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

Which of the following are the units of a henry and a farad, respectively?

Correct Answer
verified
A

Whenever the alternating current frequency in a series RLC circuit is halved,

Correct Answer
verified

Exam 33: Inductors and Ac Circuits

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

Correct AnswerverifiedA

An alternating current circuit has resistance R, inductance L, and capacitance C in series with a voltage source. Which statement is correct?

Correct AnswerverifiedShow Answer

Calculate Vout/Vin for the circuit if R = 2.0 kΩ, C = 0.020 μF and V = 140 V sin(50,000t) . ​ ​

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 series LC circuit contains a 100-mH inductor, a 36.0-mF capacitor and a 12-V battery. The period of the electromagnetic oscillations in the circuit is

Correct AnswerverifiedShow Answer

What is the average power dissipation in an RLC series circuit with R = 10 Ω, L = 0.1 H, C = 10 μF when driven at resonance by a 100 V rms source?

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

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

For driving voltage , the current through the resistor is ​ ​ ​

Correct AnswerverifiedE

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

After a switch is thrown to remove the battery from a DC LR circuit, but the circuit is still left complete, the time constant represents

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 impedance is

Correct AnswerverifiedShow Answer

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 series LC circuit contains a 100-mH inductor, a 36.0-mF capacitor and a 12-V battery. The frequency of the electromagnetic oscillations in the circuit is

Correct AnswerverifiedShow Answer

At what frequency will a 12-μF capacitor have a reactance XC = 300 Ω?

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

Which of the following are the units of a henry and a farad, respectively?

Correct AnswerverifiedA

Whenever the alternating current frequency in a series RLC circuit is halved,

Correct AnswerverifiedShow Answer

Correct Answer
verified
A

Correct Answer
verified

Calculate Vout/Vin for the circuit if R = 2.0 kΩ, C = 0.020 μF and V = 140 V sin(50,000t) .

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

For driving voltage , the current through the resistor is

Correct Answer
verified
E

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified
A

Correct Answer
verified