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A charged particle moves through a magne...

A charged particle moves through a magnetic field perpendicular to its direction. Then

A

Linear momentum changes

B

kinetic energy remains constant

C

Both (A) and (B)

D

Both linear momentum and kinetic energy varies

Text Solution

Verified by Experts

The correct Answer is:
B
When a charge particle perpendicularly enters a magnetic field to the direction, the path of the motion is circular. In circular motion, the direction of velocity changes at every point (the magnitude remains constant). Therefore the linear momentum changes at every point. But kinetic energy remains constant since th magnitude of velocity does not change.
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