Question 1

Two inductors are connected in series to a 120-V, 60-Hz supply. The values of the inductors are 1.5 H and 2.5 H. The total inductive reactance is _____.

Accepted Answer

A)   42.5 Ω
B)   365.5 Ω
C)   553.44 Ω
D)   1508 ΩE) A) and B)
F) A) and D)

Question 2

The amount of resistance compared with the inductive reactance determines the _____ of the coil.

Accepted Answer

A)   power factor (PF) 
B)   quality (Q) 
C)   phase angle ( θ ) 
D)   reactance (X) E) All of the above
F) A) and C)

Question 3

Circuits are generally considered to contain _____ when any type of load that contains a coil is used.

Accepted Answer

A)   inductance
B)   reactance
C)   resistance
D)   volt-amperesE) C) and D)
F) B) and D)

Question 4

Volt-amperes-reactive is used to measure the _____ in a pure inductive circuit.

Accepted Answer

A)   watts
B)   reactive power
C)   volt amperes
D)   joulesE) A) and D)
F) A) and B)

Question 5

Two inductors are connected in parallel to a 120-V, 60-Hz supply. The values of the inductors are 1.5 H and 2.5 H. The total inductive reactance is _____.

Accepted Answer

A)   525.5 Ω
B)   533.49 Ω
C)   942.5 Ω
D)   1508 ΩE) None of the above
F) B) and D) B

Question 6

An inductor has an inductive reactance of 12 Ω , and a wire resistance of 16 Ω . What is the impedance of the inductor?

Accepted Answer

A)   4 Ω
B)   20 Ω
C)   28 Ω
D)   400 ΩE) A) and B)
F) C) and D)

Question 7

The unit of inductance is the _____.

Accepted Answer

A)   reactance
B)   henry
C)   ohm
D)   hertzE) C) and D)
F) B) and C) B

Question 8

Two inductors are connected in series to a 120-V, 60-Hz supply. The values of the inductors are 0.175 H and 0.255 H. The total circuit current is _____.

Accepted Answer

A)   0.74 A
B)   1.02 A
C)   1.85 A
D)   3.067 AE) B) and C)
F) A) and B)

Question 9

An inductor is connected to a 240-V, 60-Hz supply. The current in the circuit is 5 A. What is the inductance of the inductor?

Accepted Answer

A)   .0048 H
B)   .0075 H
C)   .1185 H
D)   .127 HE) B) and C)
F) All of the above D

Question 10

The symbol for reactance is _____.

Accepted Answer

A)   R L
B)   X L
C)   L
D)   HE) All of the above
F) A) and C)

Question 11

The total current-limiting effect is called _____.

Accepted Answer

A)   reluctance
B)   impedance
C)   resistive reactance
D)   inductive resistanceE) All of the above
F) C) and D)

Question 12

An inductor has an inductive reactance of 64 Ω , and a wire resistance of 36 Ω . What is the impedance of the inductor?

Accepted Answer

A)   10 Ω
B)   28 Ω
C)   73.4 Ω
D)   82.92 ΩE) A) and C)
F) A) and B)

Question 13

The symbol XL stands for _____.

Accepted Answer

A)   resistance
B)   inductive resistance
C)   inductive reactance
D)   resistive reactanceE) B) and D)
F) C) and D)

Question 14

The symbol for reactive power of an inductor is _____.

Accepted Answer

A)   W
B)   VA
C)   VARs
D)   PE) B) and D)
F) C) and D)

Question 15

Two inductors are connected in parallel to a 120-V, 60-Hz supply. The values of the inductors are 0.15 H and 0.225 H. The total inductive reactance is _____.

Accepted Answer

A)   3.54 A
B)   4.84 A
C)   5.41 A
D)   6.12 AE) A) and B)
F) All of the above

Question 16

In a pure inductive circuit, current _____.

Accepted Answer

A)   lags voltage by 90 °
B)   leads voltage by 90 °
C)   is in phase with voltage
D)   lags voltage by 180 °E) None of the above
F) A) and C)

Question 17

The current-limiting property of an inductor is called _____.

Accepted Answer

A)   resistance
B)   inductance
C)   reactance
D)   henrysE) B) and C)
F) All of the above

Question 18

An inductor is connected to a 120-V, 60-Hz supply. The current in the circuit is 2.4 A. What is the inductive reactance?

Accepted Answer

A)   57.08 Ω
B)   104.8 Ω
C)   288 Ω
D)   904.8 ΩE) None of the above
F) A) and B)

Question 19

An inductor with an inductance of three henrys (H)  is to be connected to a 60 Hz circuit. What will the inductive reactance be?

Accepted Answer

A)   180 Ω
B)   360 Ω
C)   565 Ω
D)   1131 ΩE) A) and B)
F) A) and C)

Question 20

An inductor is connected to a 60 Hz circuit. The inductive reactance is 75.4 Ω . What is the inductance of the inductor?

Accepted Answer

A)   0.2 H
B)   5 H
C)   284 H
D)   4524 HE) B) and C)
F) C) and D)

Exam 17: Inductance in Ac Circuits

Two inductors are connected in series to a 120-V, 60-Hz supply. The values of the inductors are 1.5 H and 2.5 H. The total inductive reactance is _____.

Correct AnswerverifiedShow Answer

The amount of resistance compared with the inductive reactance determines the _____ of the coil.

Correct AnswerverifiedShow Answer

Circuits are generally considered to contain _____ when any type of load that contains a coil is used.

Correct AnswerverifiedShow Answer

Volt-amperes-reactive is used to measure the _____ in a pure inductive circuit.

Correct AnswerverifiedShow Answer

Two inductors are connected in parallel to a 120-V, 60-Hz supply. The values of the inductors are 1.5 H and 2.5 H. The total inductive reactance is _____.

Correct AnswerverifiedB

An inductor has an inductive reactance of 12 Ω , and a wire resistance of 16 Ω . What is the impedance of the inductor?

Correct AnswerverifiedShow Answer

The unit of inductance is the _____.

Correct AnswerverifiedB

Two inductors are connected in series to a 120-V, 60-Hz supply. The values of the inductors are 0.175 H and 0.255 H. The total circuit current is _____.

Correct AnswerverifiedShow Answer

An inductor is connected to a 240-V, 60-Hz supply. The current in the circuit is 5 A. What is the inductance of the inductor?

Correct AnswerverifiedD

The symbol for reactance is _____.

Correct AnswerverifiedShow Answer

The total current-limiting effect is called _____.

Correct AnswerverifiedShow Answer

An inductor has an inductive reactance of 64 Ω , and a wire resistance of 36 Ω . What is the impedance of the inductor?

Correct AnswerverifiedShow Answer

The symbol XL stands for _____.

Correct AnswerverifiedShow Answer

The symbol for reactive power of an inductor is _____.

Correct AnswerverifiedShow Answer

Two inductors are connected in parallel to a 120-V, 60-Hz supply. The values of the inductors are 0.15 H and 0.225 H. The total inductive reactance is _____.

Correct AnswerverifiedShow Answer

In a pure inductive circuit, current _____.

Correct AnswerverifiedShow Answer

The current-limiting property of an inductor is called _____.

Correct AnswerverifiedShow Answer

An inductor is connected to a 120-V, 60-Hz supply. The current in the circuit is 2.4 A. What is the inductive reactance?

Correct AnswerverifiedShow Answer

An inductor with an inductance of three henrys (H) is to be connected to a 60 Hz circuit. What will the inductive reactance be?

Correct AnswerverifiedShow Answer

An inductor is connected to a 60 Hz circuit. The inductive reactance is 75.4 Ω . What is the inductance of the inductor?

Correct AnswerverifiedShow Answer

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B

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B

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D

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The symbol X_L stands for _____.

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