Magnetism & Electromagnetism Objective Questions & Answers - 3

Question: 11

A magnetic needle is kept in a non uniform magnetic field. It experiences

(A) a torque but not a force

(B) a force but not a torque

(C) a force and a torque

(D) neither a force nor a torque

Question: 12

When a charged particle moves through a magnetic field, it suffers a change in

(A) speed

(B) energy

(C) direction

(D) no change

Question: 13

A strong magnetic field is applied on a stationary electron. Then the electron

(A) moves in an opposite direction

(B) moves in the direction of field

(C) starts spinning

(D) remains stationary

Question: 14

Degaussing is the process of

(A) demagnetizing metallic parts

(B) removal of magnetic impurities

(C) remagnetising metallic parts

(D) removing gases from the materials

Question: 15

The use of permanent magnets is not made in

(A) loud speakers

(B) transformers

(C) energy meters

(D) magnetos