Question 1

Complete the following tables. Frequency = 1.0 MHz
-Inductance Reactance 1 µH __________

Accepted Answer

6.28 Ω

Question 2

Complete the following tables. Frequency = 1.0 MHz
-Inductance Reactance 10 µH __________

Accepted Answer

62.8 Ω

Question 3

When a DC voltage is first switched across an LR circuit:

Accepted Answer

A)  all the current will flow through the resistor. 
B)  all the voltage is dropped across the inductor. 
C)  the maximum current flow is dependent on the inductor. 
D)  all the voltage is dropped across the resistor. 
A)  all the current will flow through the resistor. 
B)  all the voltage is dropped across the inductor. 
C)  the maximum current flow is dependent on the inductor. 
D)  all the voltage is dropped across the resistor. B

Question 4

Complete the following tables. Frequency = 400 Hz
-Inductance Reactance 0.33 mH __________

Accepted Answer

The answer of Complete the following tables. Frequency = 400...

Question 5

Physical properties that affect inductance are:

Accepted Answer

A)  number of turns, voltage applied, and core material. 
B)  area of the coil, permeability, and amount of current flow. 
C)  length of coil, resistance of the coil's wire, and number of turns. 
D)  core material, number of turns, length of the core, and cross-sectional area of the core. 
A)  number of turns, voltage applied, and core material. 
B)  area of the coil, permeability, and amount of current flow. 
C)  length of coil, resistance of the coil's wire, and number of turns. 
D)  core material, number of turns, length of the core, and cross-sectional area of the core.

Question 6

Complete the following tables. Frequency = 1.0 MHz
-Inductance Reactance 10 mH __________

Accepted Answer

The answer of Complete the following tables. Frequency = 1.0...

Question 7

Self-inductance is another term for inductance.

Accepted Answer

A) True 
 B)False

Question 8

Complete the following tables. Frequency = 1.0 MHz
-Inductance Reactance 100 µH __________

Accepted Answer

The answer of Complete the following tables. Frequency = 1.0...

Question 9

Energy is stored in an inductor in its electrostatic field.

Accepted Answer

A) True 
 B)False

Question 10

A change of one ampere per second is an inductor that induces a voltage of one volt is considered as which unit value?

Accepted Answer

A)  an Ohm 
B)  a Lenz 
C)  a Henry 
D)  a Farad 
A)  an Ohm 
B)  a Lenz 
C)  a Henry 
D)  a Farad

Question 11

The rate of change of magnetic flux and its proportional induced emf is a form of Lenz's law.

Accepted Answer

A) True 
 B)False

Question 12

The Unit of inductance is the Henry.

Accepted Answer

A) True 
 B)False

Question 13

Complete the following tables. Frequency = 10 kHz
-Inductance Reactance 0.1 H __________

Accepted Answer

The answer of Complete the following tables. Frequency = 10...

Question 14

Calculate the induced voltage across a 1 H inductor when the current is changing at a rate of 2 mA per microsecond.

Accepted Answer

A)  2 V 
B)  2000 V 
C)  200 V 
D)  20 V 
A)  2 V 
B)  2000 V 
C)  200 V 
D)  20 V

Question 15

After two time constants on the de-energizing transient, the voltage across the inductor has changed by
%, leaving % remaining.

Accepted Answer

A)  63.2, 36.8 
B)  76.7, 23.3 
C)  13.5, 86.5 
D)  86.5, 13.5 
A)  63.2, 36.8 
B)  76.7, 23.3 
C)  13.5, 86.5 
D)  86.5, 13.5

Question 16

Inductance is the property that opposes current flow.

Accepted Answer

A) True 
 B)False

Question 17

The induced voltage polarity produced by an inductor is explained by:

Accepted Answer

A)  Faraday's law 
B)  Henry's law 
C)  Ohm's law 
D)  Lenz's law. 
A)  Faraday's law 
B)  Henry's law 
C)  Ohm's law 
D)  Lenz's law.

Question 18

The time constant of an inductive circuit is dependent on the circuit's resistance.

Accepted Answer

A) True 
 B)False

Question 19

When measured, the voltage drop across an open series-connected inductor:

Accepted Answer

A)  equals the source voltage 
B)  is minus what is dropped across the meter 
C)  varies with other components 
D)  is very low 
A)  equals the source voltage 
B)  is minus what is dropped across the meter 
C)  varies with other components 
D)  is very low

Question 20

The notation di in an inductor refers to:
Dt

Accepted Answer

A)  the rate of change of current with respect to time. 
B)  the coil permeability as a function of temperature. 
C)  the ratio of current to number of turns. 
D)  the magnetizing force applied per turn. 
A)  the rate of change of current with respect to time. 
B)  the coil permeability as a function of temperature. 
C)  the ratio of current to number of turns. 
D)  the magnetizing force applied per turn.

Exam 13: Inductors

Complete the following tables. Frequency = 1.0 MHz -Inductance Reactance 1 µH __________

Complete the following tables. Frequency = 1.0 MHz -Inductance Reactance 10 µH __________

When a DC voltage is first switched across an LR circuit:

Complete the following tables. Frequency = 400 Hz -Inductance Reactance 0.33 mH __________

Physical properties that affect inductance are:

Complete the following tables. Frequency = 1.0 MHz -Inductance Reactance 10 mH __________

Self-inductance is another term for inductance.

Complete the following tables. Frequency = 1.0 MHz -Inductance Reactance 100 µH __________

Energy is stored in an inductor in its electrostatic field.

A change of one ampere per second is an inductor that induces a voltage of one volt is considered as which unit value?

The rate of change of magnetic flux and its proportional induced emf is a form of Lenz's law.

The Unit of inductance is the Henry.

Complete the following tables. Frequency = 10 kHz -Inductance Reactance 0.1 H __________

Calculate the induced voltage across a 1 H inductor when the current is changing at a rate of 2 mA per microsecond.

After two time constants on the de-energizing transient, the voltage across the inductor has changed by %, leaving % remaining.

Inductance is the property that opposes current flow.

The induced voltage polarity produced by an inductor is explained by:

The time constant of an inductive circuit is dependent on the circuit's resistance.

When measured, the voltage drop across an open series-connected inductor:

The notation di in an inductor refers to: Dt

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