27 A particle having charge q and mass m is released from

Last updated: 6/19/2023

27 A particle having charge q and mass m is released from rest on the axis of a fixed ring of total charge Q and radius R from a distance 3R Its kinetic energy when it reaches the centre of ring is 1 3 R O Qq 4 E R Qq 2 R 3 R 2 4 m q Qq 8 R Qq 16 R