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A charged particle moves with a velocity...

A charged particle moves with a velocity `vecv` in a uniform magnetic field `vecB`. The magnetic force experienced by the particle is

A

always zero

B

zero if `vecv` and `vecB` are perpendicular

C

never zero

D

zero if `vecv` and `vecB` are parallel or antiparallel.

Text Solution

Verified by Experts

The correct Answer is:
D
Magnetic force `vecF = q (vecv xx vecB)` is zero if `vecv` is either parallel or antiparallel to `vecB`.
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