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Two charged particles traverse identical...

Two charged particles traverse identical helical paths in a completely opposite sense in a uniform magnetic field `vec(B)=B_(0)hat(K)`

A

They have equal z-components of momenta

B

They must have equal charges.

C

They necessarily represent a particle, anti partile pair

D

The charge to mass ratio satisfty.

Text Solution

Verified by Experts

The correct Answer is:
D
For given pitch d correspond to charge particle, we have
`(q)/(m)=(2pivcostheta)/(qB)="constant"`
Since, charged particles traverse identical helical paths in a completely opposite sense in a uniform magnetic field B, LHS for two particle should be same and of opposite dign, therefore.
`((e)/(m))_(1)+((e)/(m))_(2)=0`
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