Magnetism & Electromagnetism Objective Questions & Answers - 1

Question: 1

The attraction capacity of electromagnet will increase if the

(A) flux density decreases

(B) flux density increases

(C) core length increases

(D) core area increases

Question: 2

The initial permeability of an iron rod is

(A) the permeability almost in non magnetised state

(B) the permeability at the end of the iron rod

(C) the lowest permeability of the iron rod

(D) the highest permeability of the iron rod

Question: 3

Magnetic moment is a

(A) vector quantity

(B) scalar quantity

(C) universal constant

(D) pole strength

Question: 4

The unit of flux is the same as that of

(A) pole strength

(B) permeance

(C) resistance

(D) reluctance

Question: 5

Reciprocal of permeability is

(A) conductance

(B) permittivity

(C) susceptibility

(D) reluctivity