Find the potential `varphi` at the edge of a thin disc of radius `R` carrying the uniformly distributed charge with surface density `sigma`.

Find the electric field potential and strength at the center of a hemisphere of radius R charged uniformly with the the surface density sigma .

Calculate potential on the axis of a disc of radius R due to a charge Q uniformly distributed on its surface.

Calculate potential on the axis of a disc of radius R due to a charge Q uniformly distributed on its surface.

The diagram shows a part of disc of radius R carrying uniformly distributed charge of density sigma . Electric potential at the centre O of parent disc is

The potential at the centre of a uniformly charged circular disc of radius 3 cm is 460V. What is the total charge on the disc?

Use Gauss' theorem to find the electric field due to a uniformly charged infinitely large plane thin sheet with surface charge density sigma .

A thin annular disc of outer radius R and R/2 inner radius has charge Q uniformly distributed over its surface. The disc rotates about its axis with a constant angular velocity omega . Choose the correct option(s):

A thin annular disc of outer radius R and R/2 inner radius has charge Q uniformly distributed over its surface. The disc rotates about its axis with a constant angular velocity omega . Choose the correct option(s):