Question

A particle of mass M and charge Q moving with velocity v describes a circular path of radius R when subjected to. a uniform transverse magnetic field of induction B. The work done by the field when the particle completes one full circle is

(a) (Mv²/R)2πR (b) zero (c) BQ2πR (d) BQv2πR

Answer 1

Correct Option(b) zero

Explanation:

When particle describes a circular path in a magnetic field, its velocity is always perpendicular to the magnetic force.