Question

A charge q moving along the x-axis with a velocity v is subjected to a magnetic field b acting along the z axis at is crosses the origin of trace the trajectory does the charged particle gain kinetic energy as it enters the magnetic field justify

Answer 1

Explanation:

(i) As, the charged particle is moving perpendicularly to the magnetic field. So, it will perform circular motion in XY-plane.

(ii) No, the charged particle does not gain any KE as Lorentz force acting on it does not perform any work as { F }_{ m } perpendicular to v.