Inductors - General Questions (9)

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Inductors - General Questions

65.

What is the total inductance, assuming no mutual inductance?

mcq8_1030_1

A.	12 mH
B.	6 mH
C.	0.73 mH
D.	0 mH

Answer: Option A

Explanation:

No answer description available for this question.

66.

Current will cause a magnetic field in a conductor as follows:

A.	An ac current causes a fixed polarity magnetic field.
B.	A dc current causes a fixed polarity magnetic field.
C.	A dc current causes an alternating magnetic field.
D.	An ac current causes a fixed polarity magnetic field and a dc current causes an alternating magnetic field.

Answer: Option B

Explanation:

No answer description available for this question.

67.

Inductance is:

A.	directly proportional to the length of the coil
B.	directly proportional to the number of turns on the coil
C.	inversely proportional to the cross-sectional area of the coil
D.	inversely proportional to the permeability

Answer: Option B

Explanation:

No answer description available for this question

68.

Electromagnetic induction is the generation of:

A.	electricity from magnetism
B.	electricity from electricity
C.	magnetism from electricity
D.	magnetism from magnetism

Answer: Option A

Explanation:

No answer description available for this question.

69.

A magnetic circuit breaker will open to protect equipment only when:

A.	voltage is exceeded
B.	an open is in the equipment
C.	the equipment is operating properly
D.	current is exceeded

Answer: Option D

Explanation:

No answer description available for this question

70.

The time difference, or lag, between flux density and magnetizing force is known as:

A.	eddy current
B.	magnetic saturation
C.	hysteresis
D.	coercivity

Answer: Option C

Explanation:

No answer description available for this question

71.

What is the inductive reactance if the Q of a coil is 60, and the winding resistance is 5 ?

A.	0.083
B.	12
C.	30
D.	300

Answer: Option D

Explanation:

No answer description available for this question

72.

The four factors determining inductance are the number of turns, coil length, coil area, and:

A.	permeability
B.	reluctance
C.	counter emf
D.	coefficient of coupling

Answer: Option A

Explanation:

No answer description available for this question

Inductors - General Questions (9)

Inductors - General Questions

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