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A particle with charge q is moving with ...

A particle with charge q is moving with a velocity `vecv` in a magnetic field `vecB`. If the force acting on the particle is `vecF` then,

A

`vecF=0`, when `vecv` and `vecB` are parallel

B

magnitude of `vecF` is maximum when `vecv` and `vecB` are perpendicular to each other

C

`|vecF|=(1)/(2)qvB` when the angle between `vecv` and `vecB` is `45^(@)`

D

direction of `vecF` remains the same when the directions of both `vecv` and `vecB` are reversed simultaneously

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The correct Answer is:
A, B, D
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