Question 1

-What is the total inductance in Figure 11-1?

Accepted Answer

A) 95 mH 
B) 225 mH 
C) 12.7 mH 
D) 15.8 mH 
A) 95 mH 
B) 225 mH 
C) 12.7 mH 
D) 15.8 mH

Question 2

What is the time constant for a 50 mH inductor and

Accepted Answer

A) 10 ms 
B) 100 s 
C) 250 s 
D)    
A) 10 ms 
B) 100 s 
C) 250 s 
D)

Question 3

Do iron-core inductors or air-core inductors generally have the larger inductance?

Accepted Answer

A) neither; iron-core inductors and air-core inductors have the same inductance 
B) iron core 
C) air core 
D) There is no way to tell. 
A) neither; iron-core inductors and air-core inductors have the same inductance 
B) iron core 
C) air core 
D) There is no way to tell.

Question 4

Inductors in series or parallel combine just like resistors in series or parallel.

Accepted Answer

A) True 
 B)False

Question 5

What is the inductive reactance of an inductor that drops 12 VRMS and carries 50 mARMS?

Accepted Answer

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

Question 6

It has been determined that the source of audible noise for a radio is du to the power supply voltage. How can an inductor be configured to eliminate this noise?

Accepted Answer

A) Connect the inductor in parallel with the radio. 
B) Connect the inductor in series with the radio power wire. 
C) An inductor will not affect the noise. 
D) both B and C 
A) Connect the inductor in parallel with the radio. 
B) Connect the inductor in series with the radio power wire. 
C) An inductor will not affect the noise. 
D) both B and C

Question 7

What is the inductance of a 20 mH inductor connected in parallel with a 50 mH inductor?

Accepted Answer

A) 14.3 mH 
B) 70 mH 
C) 50 mH 
D) 20 mH 
A) 14.3 mH 
B) 70 mH 
C) 50 mH 
D) 20 mH

Question 8

What is the total inductance if a 50 mH inductor is connected in series with a 15 mH inductor?

Accepted Answer

A) 65 mH 
B) 50 mH 
C) 15 mH 
D) 11.5 mH 
A) 65 mH 
B) 50 mH 
C) 15 mH 
D) 11.5 mH

Question 9

How many time constants will it take to completely build a magnetic field around an inductor?

Accepted Answer

A) 1 
B) 2 
C) 3 
D) 4 
E) 5 
A) 1 
B) 2 
C) 3 
D) 4 
E) 5

Question 10

The energy stored in an inductorʹs electromagnetic field is produced by the resistance of the 
inductorʹs winding.

Accepted Answer

A) True 
 B)False

Question 11

If a 25 mH inductor drops 50 V while operating at 400 Hz, what is

Accepted Answer

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

Question 12

When inductors are connected in series, their total inductance acts like:

Accepted Answer

A) resistance connected in series. 
B) resistance connected in series-parallel. 
C) resistance connected in parallel. 
D) all of these. 
A) resistance connected in series. 
B) resistance connected in series-parallel. 
C) resistance connected in parallel. 
D) all of these.

Question 13

-How much current flows in the circuit in Figure 11-1 if connected to a 12 VPP, 2 kHz source?

Accepted Answer

A) 4.77 mAp-p 
B) 10.1 mAp-p 
C) 60.5 mAp-p 
D) 126 mAp-p 
A) 4.77 mAp-p 
B) 10.1 mAp-p 
C) 60.5 mAp-p 
D) 126 mAp-p

Question 14

An   inductance is larger than a ________.

Accepted Answer

A) 0.000000008 H inductance 
B) 0.0000005 H inductance 
C) 0.000005 H inductance 
D) 0.00005 H inductance 
A) 0.000000008 H inductance 
B) 0.0000005 H inductance 
C) 0.000005 H inductance 
D) 0.00005 H inductance

Question 15

Connecting a ________ inductor in ________ with a 100 m H inductor produces a 65 m H inductance.

Accepted Answer

A) 35 mH, parallel 
B) 186 mH, series 
C) 35 mH, series 
D) 186 mH, parallel 
A) 35 mH, parallel 
B) 186 mH, series 
C) 35 mH, series 
D) 186 mH, parallel

Question 16

What is the reactance of an inductor that carries 1.

Accepted Answer

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

Question 17

What is the maximum current in a 12 mH inductor if it is connected in series with a   and a 15   source?

Accepted Answer

A) 6.32 mA 
B) 1.5 mA 
C) 1.2 mA 
D) 2.2 mA 
A) 6.32 mA 
B) 1.5 mA 
C) 1.2 mA 
D) 2.2 mA

Question 18

Stray capacitance for a coil becomes a problem:

Accepted Answer

A) with high frequencies. 
B) at resonant frequencies. 
C) with ac circuits. 
D) with low frequencies. 
A) with high frequencies. 
B) at resonant frequencies. 
C) with ac circuits. 
D) with low frequencies.

Question 19

What is the reactance of a

Accepted Answer

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

Question 20

The total inductance of two parallel inductors equals the sum of their inductance values.

Accepted Answer

A) True 
 B)False

Exam 11: Introduction to Alternating Current and Voltage

-What is the total inductance in Figure 11-1?

What is the time constant for a 50 mH inductor and

Do iron-core inductors or air-core inductors generally have the larger inductance?

Inductors in series or parallel combine just like resistors in series or parallel.

What is the inductive reactance of an inductor that drops 12 VRMS and carries 50 mARMS?

It has been determined that the source of audible noise for a radio is du to the power supply voltage. How can an inductor be configured to eliminate this noise?

What is the inductance of a 20 mH inductor connected in parallel with a 50 mH inductor?

What is the total inductance if a 50 mH inductor is connected in series with a 15 mH inductor?

How many time constants will it take to completely build a magnetic field around an inductor?

The energy stored in an inductorʹs electromagnetic field is produced by the resistance of the inductorʹs winding.

If a 25 mH inductor drops 50 V while operating at 400 Hz, what is

When inductors are connected in series, their total inductance acts like:

-How much current flows in the circuit in Figure 11-1 if connected to a 12 VPP, 2 kHz source?

An inductance is larger than a ________.

Connecting a ________ inductor in ________ with a 100 m H inductor produces a 65 m H inductance.

What is the reactance of an inductor that carries 1.

What is the maximum current in a 12 mH inductor if it is connected in series with a and a 15 source?

Stray capacitance for a coil becomes a problem:

What is the reactance of a

The total inductance of two parallel inductors equals the sum of their inductance values.

Quantities and Units

Voltage, Current, and Resistance

Ohms Law

Energy and Power

Series Circuits

Parallel Circuits

Series-Parallel Circuits

Circuit Theorems and Conversions

Branch, Loop, and Node Analyses

Magnetism and Electromagnetism

Capacitors

Inductors

Transformers

RC Circuits

RL Circuits

RlC Circuits and Resonance

Passive Filters

Circuit Theorems in Ac Analysis

Time Response of Reactive Circuits

Three-Phase Systems in Power Applications

Filters

Connecting a inductor in with a 100 m H inductor produces a 65 m H inductance.