Question 1

If a 50 mH inductor is in series with a 50 kΩ resistor across a 50 VDC source, what is the maximum current that will flow in the circuit?

Accepted Answer

A) 1 μA 
B) 10 mA 
C)    
D) 1 mA 
A) 1 μA 
B) 10 mA 
C)    
D) 1 mA

Question 2

The ripple voltage as measured at the output of a power supply has increased. following could be the problem?

Accepted Answer

A) partial shorting of the windings of the filtering coil 
B) load resistance has dropped 
C) resistance of the coil has decreased 
D) either A or B 
A) partial shorting of the windings of the filtering coil 
B) load resistance has dropped 
C) resistance of the coil has decreased 
D) either A or B

Question 3

What is the total inductance of four 10 mH inductors connected in series?

Accepted Answer

A) 2.5 mH 
B)    
C) 40 mH 
D) 250 mH 
A) 2.5 mH 
B)    
C) 40 mH 
D) 250 mH

Question 4

An iron-core inductor is used in low frequency applications.

Accepted Answer

A) True 
 B)False

Question 5

If an inductor, resistor and switch are connected in series to a 12 V battery, what is the magnitude of the inductorʹs voltage at the instant that the switch is closed?

Accepted Answer

A) 6 V 
B) 4 V 
C) 0 V 
D) 12 V 
A) 6 V 
B) 4 V 
C) 0 V 
D) 12 V

Question 6

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

Accepted Answer

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

Question 7

An inductor passes direct current and opposes alternating current.

Accepted Answer

A) True 
 B)False

Question 8

If two inductors are connected in a series AC circuit, which inductor drops more voltage?

Accepted Answer

A) It depends upon the frequency. 
B) the smaller inductance 
C) the larger inductance 
D) It depends upon the source voltage. 
A) It depends upon the frequency. 
B) the smaller inductance 
C) the larger inductance 
D) It depends upon the source voltage.

Question 9

True power for an inductor is measured in VAR rather than watts.

Accepted Answer

A) True 
 B)False

Question 10

What is the total inductance of a 40 mH inductor and a 24 mH inductor connected in parallel?

Accepted Answer

A) 15 mH 
B) 64 mH 
C) 150 mH 
D) 32 mH 
A) 15 mH 
B) 64 mH 
C) 150 mH 
D) 32 mH

Question 11

Reactive power   energy and is measured in:

Accepted Answer

A) current per time constant. 
B) volt-ampere reactive. 
C) volts per time constant. 
D) watts reactive. 
A) current per time constant. 
B) volt-ampere reactive. 
C) volts per time constant. 
D) watts reactive.

Question 12

If a 50 mH inductor operates at   equals ________.

Accepted Answer

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

Question 13

An inductor is placed in series with the load for power supply filtration.

Accepted Answer

A) True 
 B)False

Question 14

Determination of an inductorʹs value can be had by what method(s)?

Accepted Answer

A) Apply a signal of a known frequency and voltage, then use Ohmʹs law and the inductive reactance formula. 
B) Connect the inductor in series with a known value of resistance, apply a square wave of a known voltage value, then use the time constant formula. 
C) Use an inductance meter. 
D) any of the above 
A) Apply a signal of a known frequency and voltage, then use Ohmʹs law and the inductive reactance formula. 
B) Connect the inductor in series with a known value of resistance, apply a square wave of a known voltage value, then use the time constant formula. 
C) Use an inductance meter. 
D) any of the above

Question 15

What is the total inductance of a 14 mH, 22 mH and 45 mH inductor connected in series?

Accepted Answer

A) 7.2 mH 
B) 81 mH 
C) 20 mH 
D)    
A) 7.2 mH 
B) 81 mH 
C) 20 mH 
D)

Question 16

If a   inductor has a   reactance, the frequency equals ________.

Accepted Answer

A) 4.28 kHz 
B) 23.3 kHz 
C) 4.28 MHz 
D) 23.3 MHz 
A) 4.28 kHz 
B) 23.3 kHz 
C) 4.28 MHz 
D) 23.3 MHz

Question 17

If a 1 mH, 3.3 mH, and 0.1 mH inductor are connected in parallel, L T equals ________.

Accepted Answer

A) less than 0.1 mH 
B) 4.4 mH 
C) 5.3 mH 
D) greater than 3.3 mH 
A) less than 0.1 mH 
B) 4.4 mH 
C) 5.3 mH 
D) greater than 3.3 mH

Question 18

Connecting a ________ inductor in ________ with a 70 mH inductor produces a 100 mH inductance.

Accepted Answer

A) 30 mH, parallel 
B) 233 mH, series 
C) 233 mH, parallel 
D) 30 mH, series 
A) 30 mH, parallel 
B) 233 mH, series 
C) 233 mH, parallel 
D) 30 mH, series

Question 19

If two 2.   what is the circuitʹs maximum current?

Accepted Answer

A) 7.9 mA 
B) 21.3 mA 
C) 63.2 mA 
D) 1.1 mA 
A) 7.9 mA 
B) 21.3 mA 
C) 63.2 mA 
D) 1.1 mA

Question 20

In an inductive circuit, the ________ lags the ________.

Accepted Answer

A) voltage, resistance 
B) voltage, reactance 
C) current, voltage 
D) current, resistance 
A) voltage, resistance 
B) voltage, reactance 
C) current, voltage 
D) current, resistance

Exam 11: Introduction to Alternating Current and Voltage

If a 50 mH inductor is in series with a 50 kΩ resistor across a 50 VDC source, what is the maximum current that will flow in the circuit?

The ripple voltage as measured at the output of a power supply has increased. following could be the problem?

What is the total inductance of four 10 mH inductors connected in series?

An iron-core inductor is used in low frequency applications.

If an inductor, resistor and switch are connected in series to a 12 V battery, what is the magnitude of the inductorʹs voltage at the instant that the switch is closed?

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

An inductor passes direct current and opposes alternating current.

If two inductors are connected in a series AC circuit, which inductor drops more voltage?

True power for an inductor is measured in VAR rather than watts.

What is the total inductance of a 40 mH inductor and a 24 mH inductor connected in parallel?

Reactive power energy and is measured in:

If a 50 mH inductor operates at equals ________.

An inductor is placed in series with the load for power supply filtration.

Determination of an inductorʹs value can be had by what method(s)?

What is the total inductance of a 14 mH, 22 mH and 45 mH inductor connected in series?

If a inductor has a reactance, the frequency equals ________.

If a 1 mH, 3.3 mH, and 0.1 mH inductor are connected in parallel, L T equals ________.

Connecting a ________ inductor in ________ with a 70 mH inductor produces a 100 mH inductance.

If two 2. what is the circuitʹs maximum current?

In an inductive circuit, the ________ lags the ________.

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 70 mH inductor produces a 100 mH inductance.

In an inductive circuit, the lags the .