Question

Discuss the motion of a charged particle entering in a uniform magnetic field b with velocity

Answer 1

i hope this answer will help you.

when a charged particle is moving in a uniform magnetic field, force on the charged particle is given by

F = qvb sinФ

when Ф = 90

F = qvb

so charge particle moves in a circular loop. hence this force is balanced by centripetal force. hence velocity of the charged particle remains constant so kinetic energy remains constant.