Question 1

The amount of voltage induced into a conductor depends on the turns of wire, the strength of the magnetic field, and the speed of cutting action.

Accepted Answer

A) True 
 B)False

Question 2

When a conductor cuts magnetic lines of force, a voltage is induced into the conductor. This principle is called _____.

Accepted Answer

A)   electromagnetic inductance
B)   electric induction
C)   magnetic inductance
D)   electromagnetic inductionE) All of the above
F) A) and D)

Question 3

The time required for current in an inductor to reach its full Ohm's law value is called the _____ time constant.

Accepted Answer

A)   R-L
B)   R2
C)   R-C
D)   L-RE) C) and D)
F) A) and B)

Question 4

When the current flow through an inductor stops and the current also decreases at an exponential rate, a (n) _______________ occurs.

Accepted Answer

The answer of When the current flow through an inductor...

Question 5

When using the left-hand generator rule, the thumb points to the direction of _____.

Accepted Answer

A)   flux
B)   thrust
C)   current
D)   powerE) A) and C)
F) B) and D)

Question 6

When a closed loop of wire cuts through magnetic flux lines, a current is induced into the loop. The current in the loop sets up a magnetic field that is in opposition to the original magnetic flux. This is essentially _____.

Accepted Answer

A)   Coulomb's law
B)   Ohm's law
C)   Lenz's law
D)   Weber's lawE) A) and B)
F) A) and C)

Question 7

If a voltage is being induced into a conductor by electromagnetic induction, reversing the direction of motion of the conductor will _____.

Accepted Answer

A)   not change anything
B)   reverse the polarity of the induced voltage
C)   double the induced voltage
D)   halve the induced voltageE) B) and C)
F) A) and D)

Question 8

The magnetic quantity Weber (Wb)  is equal to 100,000,000 lines of flux. If a conductor cuts through one Weber per second, then a voltage of _____ volt(s)  is induced into the conductor.

Accepted Answer

A)   one
B)   four
C)   five
D)   tenE) A) and B)
F) B) and C) A

Question 9

A coil has an inductance of 3 H and a wire resistance of 15 Ω . How long will it take for the current to reach its full value?

Accepted Answer

A)   45 seconds
B)   0.2 seconds
C)   1.0 seconds
D)   25 secondsE) B) and D)
F) B) and C)

Question 10

Losses in the core of iron core inductors include _____ and _____ losses.

Accepted Answer

A)   eddy current; hysteresis
B)   resistive; inductive
C)   reactive; inductive
D)   hysteresis; inductiveE) B) and C)
F) A) and C) A

Question 11

​Exponential curves are always divided into _____ time constants.

Accepted Answer

A)   ​three
B)   ​four
C)   ​five
D)   ​sixE) B) and D)
F) None of the above C

Question 12

When using the left-hand generator rule, the center finger points to the direction of _____.

Accepted Answer

A)   thrust
B)   flux
C)   current
D)   powerE) None of the above
F) B) and C)

Question 13

If current is flowing in a circuit containing an inductor and the power switch is opened, the magnetic field surrounding the inductor collapses and induces voltage into the inductor, resulting in a voltage spike.

Accepted Answer

A) True 
 B)False

Question 14

A way of determining the relationships of the motion of the conductor, the magnetic field direction, and the direction of the induced current is by using the _____.

Accepted Answer

A)   left-hand generator rule
B)   right-hand generator rule
C)   left-hand motor rule
D)   right-hand motor ruleE) A) and C)
F) A) and B)

Question 15

What is the unit of measurement for inductance?

Accepted Answer

A)   farad (F) 
B)   henry (H) 
C)   ohm ( Ω ) 
D)   Weber (Wb) E) None of the above
F) B) and C)

Question 16

An induced voltage opposes the motion that causes it according to _____.

Accepted Answer

A)   Ohm's law
B)   Lenz's law
C)   Coulomb's theory
D)   Fleming's ruleE) A) and B)
F) A) and C)

Question 17

The direction of induced current can be determined by using _____'s left-hand generator rule.

Accepted Answer

A)   Ohm
B)   Kirchhoff
C)   Fleming
D)   CoulombE) All of the above
F) A) and B)

Question 18

Inductors always _______________ a change of current.

Accepted Answer

The answer of Inductors always _______________ a change of current....

Question 19

What is one device used for spike suppression in either direct or alternating current circuits?

Accepted Answer

A)   metal oxide varistor
B)   voltage varistor
C)   inductive varistor
D)   capacitive varistorE) C) and D)
F) A) and B)

Question 20

If a conductor is moved upward, the polarity of induced voltage is reversed and the current flows in the _______________ direction.

Accepted Answer

The answer of If a conductor is moved upward, the...

Exam 14: Magnetic Induction

The amount of voltage induced into a conductor depends on the turns of wire, the strength of the magnetic field, and the speed of cutting action.

Correct AnswerverifiedShow Answer

When a conductor cuts magnetic lines of force, a voltage is induced into the conductor. This principle is called _____.

Correct AnswerverifiedShow Answer

The time required for current in an inductor to reach its full Ohm's law value is called the _____ time constant.

Correct AnswerverifiedShow Answer

When the current flow through an inductor stops and the current also decreases at an exponential rate, a (n) _______________ occurs.

Correct AnswerverifiedShow Answer

When using the left-hand generator rule, the thumb points to the direction of _____.

Correct AnswerverifiedShow Answer

When a closed loop of wire cuts through magnetic flux lines, a current is induced into the loop. The current in the loop sets up a magnetic field that is in opposition to the original magnetic flux. This is essentially _____.

Correct AnswerverifiedShow Answer

If a voltage is being induced into a conductor by electromagnetic induction, reversing the direction of motion of the conductor will _____.

Correct AnswerverifiedShow Answer

The magnetic quantity Weber (Wb) is equal to 100,000,000 lines of flux. If a conductor cuts through one Weber per second, then a voltage of _____ volt(s) is induced into the conductor.

Correct AnswerverifiedA

A coil has an inductance of 3 H and a wire resistance of 15 Ω . How long will it take for the current to reach its full value?

Correct AnswerverifiedShow Answer

Losses in the core of iron core inductors include _____ and _____ losses.

Correct AnswerverifiedA

​Exponential curves are always divided into _____ time constants.

Correct AnswerverifiedC

When using the left-hand generator rule, the center finger points to the direction of _____.

Correct AnswerverifiedShow Answer

If current is flowing in a circuit containing an inductor and the power switch is opened, the magnetic field surrounding the inductor collapses and induces voltage into the inductor, resulting in a voltage spike.

Correct AnswerverifiedShow Answer

A way of determining the relationships of the motion of the conductor, the magnetic field direction, and the direction of the induced current is by using the _____.

Correct AnswerverifiedShow Answer

What is the unit of measurement for inductance?

Correct AnswerverifiedShow Answer

An induced voltage opposes the motion that causes it according to _____.

Correct AnswerverifiedShow Answer

The direction of induced current can be determined by using _____'s left-hand generator rule.

Correct AnswerverifiedShow Answer

Inductors always _______________ a change of current.

Correct AnswerverifiedShow Answer

What is one device used for spike suppression in either direct or alternating current circuits?

Correct AnswerverifiedShow Answer

If a conductor is moved upward, the polarity of induced voltage is reversed and the current flows in the _______________ direction.

Correct AnswerverifiedShow Answer

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A

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Losses in the core of iron core inductors include _ and _ losses.

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A

Exponential curves are always divided into _____ time constants.

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C

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