
A charge is placed at a distance of above the centre of a disc of radius The magnitude of flux through the disc is Now a hemispherical shell of radius is placed over the disc such that it forms a closed surface. The flux through the curved surface (taking the direction of area vector along outward normal as positive), is -




Important Questions on Electrostatics


Gauss law is given by if net charge enclosed by Gaussian surface is zero then-.


The fig. shows lines of constant potential in a region in which an electric field is present. The value of the potential are written in brackets of the points and the magnitude of the electric field is greatest at the point -



The figure shows a thick metallic sphere. If it is given a charge then an electric field will be present in the region
