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
reluctance
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
ferrites
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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