The surface charge density of a thin charged disc of radius is
PHYSICS · Single correct · CBSE · Physics · Electric Charges and Fields · Electric Charges and Fields
Problem
The surface charge density of a thin charged disc of radius R is ρ . The value of the electric field at the centre of the disc is 2ϵ0ρ . With respect to the field at the centre, the electric field along the axis at a distance R from the centre of the disc:
(1) reduces by 70.7%
(2) reduces by 29.3%
(3) reduces by 9.7%
(4) reduces by 14.6%