1.

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 non-conducting sphere with charged density rho. The minimum velocity with which the point charge should be projeted such it can it reach the opposite end of the tunnel is equal to.

Answer»

`[RHOR^(2)//4mepsilon_(0)]^(1//2)`
`[rhoR^(2)//24mepsilon_(0)]^(1//2)`
`[rhoR^(2)//6mepsilon_(0)]^(1//2)`
zero because the intial and the FINAL POINTS are at same potential

Answer :A


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