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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-antiparticle pair

D

The charge to mass ratio satisfy:
`(e/m)_1+(e/m)_2=0`

Text Solution

Verified by Experts

The correct Answer is:
D
In a uniform magnetic field, the two charged particles will traverse identical helical paths in a completely opposite sense if the charge/mass ratio of these two particles is same and charges on them are of opposite character. In this situation `(e//m)_1+(e//m)_2=0`, holds good.
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