Find the electric field potentail and strength at the centre of a hemisphere fo raidus `R` ahcged uniformly with the the 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 .

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

The magnitude of the electric field on the surface of a sphere of a sphere of radius r having a unifrom surface charge density sigma is

A very thin round plate of radius R carrying a uniform surface charge density sigma is located in vacumm. Find the electric field potentail and strength along the plate's axis as a function of a distance l from its centre. Investigation the obtained expression of l rarr 0 and l gt gt R .

The magnitude of the electric field on the surface of a sphere of radius r having a uniform surface charge density sigma is

Find the electric field strength vector at the centre of a ball of raiduius R with volume charge density rho implies ar , where a is a constant vector, and r is a radius vector drawn from the ball's centre.