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A unit positive point charge of mass m i...

A unit positive point charge of mass `m` is projected with a velocity `V` inside the tunnel as shown. The tunnel has been made inside a uniformly charged nonconducting sphere. The minimum velocity with which the point charge should be projected such that it can reach the opposite end of the tunnel is equal to
(##BMS_V03_C03_E01_124_Q01.png" width="80%">

A

`[rhoR^(2)//4mepsilon_(0)]^(1//2)`

B

`[rhoR^(2)//24mepsilon_(0)]^(1//2)`

C

`[rhoR^(2)//6mepsilon_(0)]^(1//2)`

D

zero because the intial and the final points are at same potential

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The correct Answer is:
A
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