1000+ Magnetic Circuit MCQ Questions and Answers Pdf - 1

Question: 1

The rate of rise of current through an inductive coil is maximum

(A) after one time constant

(B) at 63.2% of its maximum steady value

(C) at the start of the current flow

(D) near the final maximum value of current

Ans: C

at the start of the current flow

Question: 2

A material for good magnetic memory should have

(A) high retentivity

(B) low retentivity

(C) high permeability

(D) low hysteresis loss

Ans: A

high retentivity

Question: 3

The property of a material which composes the creation of magnetic flux in it is known as

(A) reluctance

(B) permeance

(C) magnetomotive force

(D) reluctivity

Ans: A


Question: 4

The transformer cores operating at microwave frequency range, are usually made of

(A) ferrites

(B) silicon steels

(C) copper

(D) carbon

Ans: A


Question: 5

A ferrite core has less eddy current loss than an iron core because

(A) ferrites have high hysteresis

(B) ferrites have low permeability

(C) ferrites are magnetic

(D) ferrites have high resistance

Ans: A

ferrites have high hysteresis

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