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# a unit positive charge of mass m is projected with velocity v inside a tunnel which has been made inside a uniformly charged non conducting sphere,at distance r/2 from centre.find the minimum velocity with which a point charge should be projected from one end of the tunnel so that it can reach the other end of the tunnel

Arun
25763 Points
3 years ago
Dear student
I am getting my answer as $\sqrt$($\rho$ r²/4m$\epsilon$)...please let me know if this correct then I will share my solution.
Prateek
15 Points
3 years ago
Yes the answer  is right please  share the solution of the question.