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Circular Kinematics

Question

If a charged particle is projected perpendicular to a uniform magnetic field, then
a) it revolves in circular path
b) its K.E. remains constant
c) its momentum remains constant
d) its path is spiral
only a, b are correct
only a, c are correct
only b, d are correct
only a, d are correct

A

only a, d are correct

B

only a, b are correct

C

only b, d are correct

D

only a, c are correct

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Solution

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If a charged particle is projected perpendicular to a uniform magnetic field, then particle revolves in a circular path and its kinetic energy remains constant since there is no work done by magnetic force. Since a circular path direction of particle changes, so, momentum also changes.

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