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Question
Physics
A charged particle moves through a magnetic field perpendicular to its direction then.
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Q. A charged particle moves through a magnetic field perpendicular to its direction then.
KCET
KCET 2022
A
Both momentum and kinetic energy of the particle are constant
B
Both momentum and kinetic energy of the particle are constant
C
Kinetic energy changes but the momentum is constant
D
The momentum changes but the kinetic energy is constant.
Solution:
since the charged particle enters perpendicular to magnetic field, it describes circular path. Since velocity and force are mutually perpendicular, no change in the velocity. Hence both momentum and kinetic energy remains constant.