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

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 .

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.

Find the electric field at the centre of a semicircular ring if it is uniformly positive charged.

Find the electric field at the centre of a uniformly charged semicircular ring of radius R. Linear charge density is lamda

The electric field intensity in free space at a distance 'r' outside a charged conducting sphere of radius 'R' in terms of surface charge density sigma is

A point charge Q is placed at the centre of a hemisphere. Find the electric flux passing through flat surface of hemisphere.

Calculate electric field at a point on axis, which at a distance x from centre of uniformly charged disc having surface charge density sigma and R which also contains a concentric hole of radius r.