A disc of radius R is kept such that its axis coincide with the x-axis and its centre is at (d,0,0). The thickness of disc is t and it carries a uniform volume charge density p. The external electric field in the space is given by Ë =Kĩ where K = Constant and ř is position vector of any point in space with respect to the origin of the coordinate system. Find the electric force on the disc.

A disc of radius R is kept such that its axis coincide with the x-axis and its centre is at (d,0,0). The thickness of disc is t and it carries a uniform volume charge density p. The external electric field in the space is given by Ë =Kĩ where K = Constant and ř is position vector of any point in space with respect to the origin of the coordinate system. Find the electric force on the disc.