1000+ Magnetic Circuit Multiple Choice Questions and Answers Pdf - 2

Question: 6

Whatever may be the flux density in _____ the material will never saturate.

(A) silicon steel

(B) air

(C) cobalt steel

(D) soft iron

Question: 7

At low frequencies, the material used for transformers cores is

(A) copper

(B) soft iron

(C) silicon iron

(D) none of the above

Question: 8

The hysteresis cycle for the material of a transformer is

(A) short and wide

(B) short and narrow

(C) tall and wide

(D) tall and narrow

Question: 9

Permanent magnets are normally made

(A) wrought iron

(B) cast iron

(C) aluminium

(D) alnico alloys

Question: 10

An air gap is usually inserted in magnetic circuits to

(A) prevent saturation

(B) increase m.m.f.

(C) increase the flux

(D) none of the above