A charge `+Q` is uniformly distributed in a spherical volume of radius R. A
Channel: Doubtnut
Date: 26/07/2020

A charge `+Q` is uniformly distributed in a spherical volume of radius R. A particle of charge `+q` and mass m projected with velocity `v_0` the surface of the sherical volume to its centre inside a smooth tunnel dug across the sphere. The minimum value of `v_0` such tht it just reaches the centre (assume that thee is no resistance on the particle except electrostatic force) of he sphericle volume is