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Force on a Current Element

Question

A charged particle is projected perpendicular to a uniform magnetic field. Arrange the following in correct order of occurrence :
A) The direction of momentum of the particle changes
B) The particle experiences a force
C) The particle revolves in a circular path

A

A,B,C

B

B,A,C

C

C,B,A

D

C,A,B

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Solution

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When particle is projected in uniform magnetic field a force = $q (\to V \times \to B)$ acts which result in change in direction of momentum of the particle and particle starts revolving in a circular path.
So, order is B, A, C.

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