1000+ Electromagnetic Induction MCQ Questions and Answers - 1

Question: 1

An open coil has

(A) zero resistance and high inductance

(B) zero resistance and inductance

(C) infinite resistance and zero inductance

(D) infinite resistance and normal inductance

Question: 2

A laminated iron core has reduced eddy current losses because

(A) the laminations are stacked vertically

(B) the magnetic flux is concentrated in the air gap of the core

(C) more wire can be used with less D.C. resistance in coil

(D) the laminations are insulated from each other

Question: 3

Which of the following is unit of inductance?

(A) webers/metre

(B) ampere turns

(C) henry

(D) ohm

Question: 4

Lenz’s law is a consequence of the law of conservation of

(A) induced e.m.f.

(B) energy

(C) charge

(D) induced current

Question: 5

Which circuit elements will oppose the change in circuit current?

(A) inductance and capacitance

(B) capacitance only

(C) resistance only

(D) inductance only