When a magnetic field is applied in a direction perpendicular to the direction of cathode rays, then their:-

Question

When a magnetic field is applied in a direction perpendicular to the direction of cathode rays, then their:- (A) Energy decreases (B) Energy increases (C) Momentum increases (D) Magnitude of momentum and energy remain unchanged

Tardigrade Admin · Accepted Answer

Since force is perpendicular to direction of motion. So, work done by magnetic force is zero. Hence, energy and magnitude of momentum remains constant.

Q. When a magnetic field is applied in a direction perpendicular to the direction of cathode rays, then their:-

Energy decreases

Energy increases

Momentum increases

Magnitude of momentum and energy remain unchanged

Since force is perpendicular to direction of motion. So, work done by magnetic force is zero. Hence, energy and magnitude of momentum remains constant.