Inductors - General Questions (10)

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Inductors - General Questions

73.

What is the number of turns required in the secondary winding for a transformer when 120 volts is applied to a 2400-turn primary to produce 7.5 V_ac at the secondary?

A.	75 turns
B.	150 turns
C.	900 turns
D.	1920 turns

Answer: Option B

Explanation:

No answer description available for this question.

74.

Which two values are plotted on a B-H curve graph?

A.	reluctance and flux density
B.	permeability and reluctance
C.	magnetizing force and permeability
D.	flux density and magnetizing force

Answer: Option D

Explanation:

No answer description available for this question

75.

A magnetic field has:

A.	polar fields
B.	lines of force
C.	magnetomotive force
D.	lines of reluctance

Answer: Option B

Explanation:

No answer description available for this question.

76.

Electromagnetism is the:

A.	magnetic field caused by a permanent magnet
B.	action between a permanent and an artificial magnet
C.	magnetic field action with a current-carrying wire
D.	current in the coil

Answer: Option C

Explanation:

No answer description available for this question

77.

What is the permeability of transformer iron?

A.	50
B.	450
C.	1,500
D.	5,500

Answer: Option D

Explanation:

No answer description available for this question

78.

The polarity of induced voltage while a field is collapsing is:

A.	independent of the force creating it
B.	opposite to the force creating it
C.	identical to the force creating the field
D.	present only if the force is stationary

Answer: Option B

Explanation:

No answer description available for this question

79.

What does Faraday's law concern?

A.	a magnetic field in a coil
B.	a magnetic field cutting a conductor
C.	a magnetic field hystersis
D.	a magnetic field in a conductor

Answer: Option B

Explanation:

No answer description available for this question

80.

A henry value divided by a circuit resistive value provides the:

A.	counter emf value
B.	induced voltage amplitude
C.	rise or decay time constant
D.	quality factor of the coil

Answer: Option B

Explanation:

No answer description available for this question

Inductors - General Questions (10)

Inductors - General Questions

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