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Two particles of charges +Q and -Q are p...

Two particles of charges `+Q` and `-Q` are projected from the same point with a velocity v in a region of unifrom magnetic filed `B` such that the velocity vector makes an angle 'theta' with the magnetic filed Their masses are `M` and `2M` respectively Then, they will meet again for the first time at a point whose distane from the point of projection is .

A

`(2pi Mvcos theta)/(QB)`

B

`(8pi Mv cos theta)/(QB)`

C

`(pi Mv cos theta)/(QB)`

D

`(pi Mv cos theta)/(QB)`

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The correct Answer is:
D
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