Question 1

Inductor values ______________ 1 μH are generally not practical for use in electronic circuits.

Accepted Answer

below

Question 2

When alternating current flows in an inductance, the amount of current is much less than the dc resistance alone would allow.

Accepted Answer

A) True 
 B)False

Question 3

Frequency is equal to

Accepted Answer

A)   2p x T
B)   2p/T
C)   p/T
D)   1/TE) All of the above
F) None of the above

Question 4

XL equals

Accepted Answer

A)   1/2?fL
B)   2?fL
C)   2?/fL
D)   f/2?LE) A) and D)
F) All of the above

Question 5

Since reactance is an opposition in ohms, the values XL in series or parallel are combined the same way as ohms of resistance.

Accepted Answer

A) True 
 B)False

Question 6

For an inductor, the induced voltage VL always

Accepted Answer

A)   lags the current I by 90°
B)   leads the current I by 90°
C)   lags the current I by 180°
D)   leads the current I by 180°E) A) and D)
F) None of the above

Question 7

Inductor values ______________ 1 mH are generally not practical for use in electronic circuits.

Accepted Answer

The answer of Inductor values ______________ 1 mH are generally...

Question 8

The higher the frequency of the alternating current, and the greater the inductance, the XL opposition will be increased.

Accepted Answer

A) True 
 B)False

Question 9

The combined parallel inductive reactance will be greater than the lowest branch reactance.

Accepted Answer

A) True 
 B)False

Question 10

Inductive reactance only applies to

Accepted Answer

A)   direct current
B)   sine wave ac
C)   square wave ac
D)   pulse wave acE) All of the above
F) A) and B) B

Question 11

For an inductor, the induced voltage, VL always ______________ the current by 90°.

Accepted Answer

leads

Question 12

There is inductive reactance for steady direct current.

Accepted Answer

A) True 
 B)False

Question 13

In a series circuit containing two inductors and a voltage source, the current is less in the inductor with the higher inductance.

Accepted Answer

A) True 
 B)False

Question 14

The amount of inductive reactance equals two pi times the frequency plus the inductance.

Accepted Answer

A) True 
 B)False

Question 15

How much is the XL for a coil with negligible resistance that has 62.8 V across it with 0.1 A of current?

Accepted Answer

A)   62.8 ?
B)   628 ?
C)   6280 ?
D)   62,800 ?E) C) and D)
F) All of the above

Question 16

The amount of current in an ac circuit with only inductive reactance is ______________ the applied voltage divided by XL.

Accepted Answer

Question 17

What results from an inductor's counter emf with a varying current?

Accepted Answer

A)   Transformer action
B)   Impedance
C)   Resistance
D)   Inductive reactanceE) A) and B)
F) All of the above

Question 18

The constant factor 2p indicates the circular motion from which a sine wave is derived.

Accepted Answer

A) True 
 B)False

Question 19

The polarity of an inductor's counter emf is always such that it ______________ a change in current.

Accepted Answer

The answer of The polarity of an inductor's counter emf...

Question 20

In a parallel circuit with two inductors and voltage source, the voltage is the same across both inductors and is equal to the voltage source.

Accepted Answer

A) True 
 B)False

Exam 21: Inductive Reactance

Inductor values ______________ 1 μH are generally not practical for use in electronic circuits.

Correct Answerverifiedbelow

When alternating current flows in an inductance, the amount of current is much less than the dc resistance alone would allow.

Correct AnswerverifiedShow Answer

Frequency is equal to

Correct AnswerverifiedShow Answer

XL equals

Correct AnswerverifiedShow Answer

Since reactance is an opposition in ohms, the values XL in series or parallel are combined the same way as ohms of resistance.

Correct AnswerverifiedShow Answer

For an inductor, the induced voltage VL always

Correct AnswerverifiedShow Answer

Inductor values ______________ 1 mH are generally not practical for use in electronic circuits.

Correct AnswerverifiedShow Answer

The higher the frequency of the alternating current, and the greater the inductance, the XL opposition will be increased.

Correct AnswerverifiedShow Answer

The combined parallel inductive reactance will be greater than the lowest branch reactance.

Correct AnswerverifiedShow Answer

Inductive reactance only applies to

Correct AnswerverifiedB

For an inductor, the induced voltage, VL always ______________ the current by 90°.

Correct Answerverifiedleads

There is inductive reactance for steady direct current.

Correct AnswerverifiedShow Answer

In a series circuit containing two inductors and a voltage source, the current is less in the inductor with the higher inductance.

Correct AnswerverifiedShow Answer

The amount of inductive reactance equals two pi times the frequency plus the inductance.

Correct AnswerverifiedShow Answer

How much is the XL for a coil with negligible resistance that has 62.8 V across it with 0.1 A of current?

Correct AnswerverifiedShow Answer

The amount of current in an ac circuit with only inductive reactance is ______________ the applied voltage divided by XL.

Correct AnswerverifiedShow Answer

What results from an inductor's counter emf with a varying current?

Correct AnswerverifiedShow Answer

The constant factor 2p indicates the circular motion from which a sine wave is derived.

Correct AnswerverifiedShow Answer

The polarity of an inductor's counter emf is always such that it ______________ a change in current.

Correct AnswerverifiedShow Answer

In a parallel circuit with two inductors and voltage source, the voltage is the same across both inductors and is equal to the voltage source.

Correct AnswerverifiedShow Answer

Correct Answer
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below

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X_L equals

Correct Answer
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Since reactance is an opposition in ohms, the values X_L in series or parallel are combined the same way as ohms of resistance.

Correct Answer
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For an inductor, the induced voltage V_L always

Correct Answer
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The higher the frequency of the alternating current, and the greater the inductance, the X_L opposition will be increased.

Correct Answer
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B

For an inductor, the induced voltage, V_L always ______________ the current by 90°.

Correct Answer
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How much is the X_L for a coil with negligible resistance that has 62.8 V across it with 0.1 A of current?

Correct Answer
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The amount of current in an ac circuit with only inductive reactance is ______________ the applied voltage divided by X_L.

Correct Answer
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