- A point charge Q is located on the axis of a disc of radius R at a distance b from the plane of the disc . If ¼ th of the electric flux from the charge passes through the disc, then show that R=sqrt(3b).
- A point charge Q is located on the axis of a disc of radius R at a distance b from the plane of the disc . If ¼ th of the electric flux from the charge passes through the disc, then show that R=sqrt(3b).