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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 uniform magnetic field B such that the velocity vector makes an angle`||` with the magnetic field. Their masses are M and 2M, respectively. Then, they will meet again for the first time at a point whose distance 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)`

Text Solution

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The correct Answer is:
D
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