Question
Question: When a magnetic field is applied in a direction perpendicular to the direction of cathode rays, then...
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
Momentum and energy remain unchanged
Answer
Momentum and energy remain unchanged
Explanation
Solution
Since force is perpendicular to direction of motion. energy and magnitude of momentum remains constant.