Question

why does not the energy of a charged particle moving in a uniform magnetic field change? ​

Answer 1

Answer:

The force on a charged particle moving in a uniform magnetic field always acts in direction perpendicular to the direction of motion of the charge. As work done by magnetic field on the charge is zero, [W=FScosθ], so the energy of the charged particle does not change.

Answer 2

HELLO!

If a charge moves in a uniform magnetic field that is perpendicular to the direction, the magnetic field has no effect on the magnitude of the velocity of the charge. Hence, the energy of the charged particle remains constant.

However, an EMF is developed due to the movement, known as Motional EMF, which is given as:

E = L (v x B)

Thanks!