On a smooth horizontal surface we have a point charge

Last updated: 6/10/2023

On a smooth horizontal surface we have a point charge attached to the free end of a massless rod hinged at other end as shown We apply a uniform electric field E and slightly deflect the rod The force on charge accelerate it during half rotation then the direction of electric field is suddenly reversed so that the charge remain accelerating assuming q 1C m 1kg E 1N C length of rod L 1m The total angle rotated when the point charge attains a speed of 5 m s is 38 n n Then value of n is E q m hinge A