Question

if a proton is moving at 90 degree to the uniform magnetic field what will be the charge kinetic energy proton ?give reason

Answer 1

Answer:

The magnetic force exerted will be perpendicular to the direction of motion of the proton. As we know when when force acting is perpendicular to the direction of moving charge, work done will be zero. It means kinetic energy does not change. The force is able to change the direction (velocity) of the proton but not its speed (magnitude). Thus momentum and velocity changes.