Question 1

A 0.33 mH inductance is smaller than a ________.

Accepted Answer

A) 0.05 mH inductance 
B) 33 pH inductance 
C) 0.0005 H inductance 
D) 330 pH inductance 
A) 0.05 mH inductance 
B) 33 pH inductance 
C) 0.0005 H inductance 
D) 330 pH inductance C

Question 2

The energy stored in an inductorʹs electromagnetic field is produced by the inductorʹs current.

Accepted Answer

A) True 
 B)False  True

Question 3

The quality factor of a coil or inductor is calculated by:

Accepted Answer

A)    . 
B)    
C)    
D)    
A)    . 
B)    
C)    
D)    D

Question 4

The most commonplace use for inductors in electronics:

Accepted Answer

A) passes AC voltages. 
B) blocks DC voltages. 
C) passes DC voltages. 
D) blocks AC voltages. 
A) passes AC voltages. 
B) blocks DC voltages. 
C) passes DC voltages. 
D) blocks AC voltages.

Question 5

How many time constants will it take to completely collapse an inductorʹs magnetic field?

Accepted Answer

A) 3 
B) 4 
C) 1 
D) 5 
A) 3 
B) 4 
C) 1 
D) 5

Question 6

The voltage and current are in phase in an inductive circuit.

Accepted Answer

A) True 
 B)False

Question 7

If an inductor has an ac current flowing through it, the magnetic field is ________.

Accepted Answer

A) collapsed 
B) steady 
C) constantly changing 
D) moving from south to north 
A) collapsed 
B) steady 
C) constantly changing 
D) moving from south to north

Question 8

What is the inductive reactance of a 0.

Accepted Answer

A)    
B)    
C)    
D)    
A)    
B)    
C)    
D)

Question 9

If an inductor carries 150   resistance?

Accepted Answer

A)    
B)    
C)    
D)    
A)    
B)    
C)    
D)

Question 10

What is the total inductance of a 25 mH inductor connected in parallel with a 100 mH inductor?

Accepted Answer

A) 20 mH 
B) 125 mH 
C) less than 20 mH 
D) more than 125 mH 
A) 20 mH 
B) 125 mH 
C) less than 20 mH 
D) more than 125 mH

Question 11

-Which type of inductor core material is likely to produce the least inductance?

Accepted Answer

A) ferrite 
B) iron 
C) air 
A) ferrite 
B) iron 
C) air

Question 12

The time constant for an inductor for each time period:

Accepted Answer

A) corresponds to a 37% of the decrease in value. 
B) is a constant value. 
C) corresponds to a 63% of the increase in value. 
D) all of these. 
A) corresponds to a 37% of the decrease in value. 
B) is a constant value. 
C) corresponds to a 63% of the increase in value. 
D) all of these.

Question 13

Inductive reactance decreases as frequency increases.

Accepted Answer

A) True 
 B)False

Question 14

The voltage leads the current in an inductive circuit.

Accepted Answer

A) True 
 B)False

Question 15

If an inductor is placed in an ac circuit, the ac voltage across the inductor leads the ac current 10)
through it.

Accepted Answer

A) True 
 B)False

Question 16

What is the inductive reactance of a 150 mH inductor operating at 10 kHz?

Accepted Answer

A)    
B)    
C)    
D)    
A)    
B)    
C)    
D)

Question 17

The quality factor for an inductor becomes more apparent at higher frequencies.

Accepted Answer

A) True 
 B)False

Question 18

If a 27 m H inductor has a reactance of   the frequency equals ________.

Accepted Answer

A) 3.24 kHz 
B) 32.4 kHz 
C) 932 Hz 
D) 324 Hz 
A) 3.24 kHz 
B) 32.4 kHz 
C) 932 Hz 
D) 324 Hz

Question 19

What is one time constant for a 10 mH inductor connected in series with a

Accepted Answer

A)    
B) 470 mS 
C)    
D) 470 S 
A)    
B) 470 mS 
C)    
D) 470 S

Question 20

The time constant of an inductor is:

Accepted Answer

A) inversely proportional to the resistance in the circuit. 
B) the time required for voltage or current to increase to 63% or to decrease to 37%. 
C) directly proportional to the inductance in the circuit. 
D) all of these. 
A) inversely proportional to the resistance in the circuit. 
B) the time required for voltage or current to increase to 63% or to decrease to 37%. 
C) directly proportional to the inductance in the circuit. 
D) all of these.

Exam 11: Introduction to Alternating Current and Voltage

A 0.33 mH inductance is smaller than a ________.

The energy stored in an inductorʹs electromagnetic field is produced by the inductorʹs current.

The quality factor of a coil or inductor is calculated by:

The most commonplace use for inductors in electronics:

How many time constants will it take to completely collapse an inductorʹs magnetic field?

The voltage and current are in phase in an inductive circuit.

If an inductor has an ac current flowing through it, the magnetic field is ________.

What is the inductive reactance of a 0.

If an inductor carries 150 resistance?

What is the total inductance of a 25 mH inductor connected in parallel with a 100 mH inductor?

-Which type of inductor core material is likely to produce the least inductance?

The time constant for an inductor for each time period:

Inductive reactance decreases as frequency increases.

The voltage leads the current in an inductive circuit.

If an inductor is placed in an ac circuit, the ac voltage across the inductor leads the ac current 10) through it.

What is the inductive reactance of a 150 mH inductor operating at 10 kHz?

The quality factor for an inductor becomes more apparent at higher frequencies.

If a 27 m H inductor has a reactance of the frequency equals ________.

What is one time constant for a 10 mH inductor connected in series with a

The time constant of an inductor is:

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