1000+ Electromagnetic Field Multiple Choice Questions and Answers - 2

Question: 6

When a magnet is in motion relative to a coil the induced emf does not depend upon

(A) number of turns of the coil

(B) resistance of the coil

(C) pole strength of the magnet

(D) motion of the magnet

Question: 7

Magnetostriction is a phenomenon of

(A) generation of electricity in ferromagnetic materials

(B) change in permeability of ferromagnetic materials during magnetism

(C) generation of magnetism in electrical conductance

(D) change in physical dimensions of ferromagnetic materials during magnetism

Question: 8

Conductor is constant and field is varying then emf will be induced. This principle is called

(A) static induced emf

(B) virtually induced emf

(C) dynamically induced emf

(D) none of the above

Question: 9

The ability of charged bodies to exert force on one another is attributed to the existence of

(A) neutrons

(B) electric field

(C) protons

(D) electrons

Question: 10

For DC voltage an inductor is virtually a

(A) depends on magnitude of voltage

(B) depends on polarity

(C) open circuit

(D) short circuit