Question

When a charged particle moves perpendicular to a uniform magnetic field, its

• A. energy and momentum both change.
• B. energy changes but momentum remains unchanged.
• C. momentum changes but energy remains unchanged.
• D. energy and momentum both do not change.

Answer 1

The correct option is C momentum changes but energy remains unchanged.

Since the force exerted by the magnetic field is perpendicular to the direction of the particle the speed of the particle cannot change but its velocity changes .

so C option is the correct answer