A charge +Q is uniformly distributed over a thin ring of the radius R. The velocity of an
Channel: Doubtnut
Date: 2020-08-30

A charge +Q is uniformly distributed over a thin ring of the radius R. The velocity of an electron at the moment when it passes through the centre O of the ring, if the electron was initially at far away on the axis of the ring is (m=mass of electron, `K=1/(4pi epsi_(0))`)