Question

3. When a charged particle moves in a magnetic field its
kinetic energy always :
(a) increases
(b) decreases
(c) remains unchanged
(d) increases or decreases depending upon projection of
particle.
​

Answer 1

Answer:

c / remains unchanged

Explanation:

The magnetic field doesn't change the speed of the charged particle. The reason is that the magnetic field doesn't affect the speed is because the magnetic field applies a force perpendicular to the velocity. Hence, the force can't do work on the particle. As a result, the particle can't change its kinetic energy.// this is true answer and confirmed