When an neutral metal sphere of radius r is placed in an external field `Ehat i `surface charge density at A is found to be `sigma_(0)`. At what minimum angle `theta` in degree density is `(sigma_(0))/(2)`?

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

Three concentric spherical metallic spheres A,B and C of radii a , b and c(a lt b lt c) have surface charge densities sigma , -sigma and sigma respectively.

When a charge of amount Q is given to an isolated metal plate X of surface area A, its surface charge density becomes sigma_(1) . When an isolated identical plate Y is brought close to X the surface charge density on X becomes sigma_(2) . When Y is earthed the surface charge density on X becomes sigma_(3) . Choose the incorrect option.

Electric field due to an infinite non-conducting sheet of surface charge density sigma , at a distance r from it is

Two metal spheres, one fo radius R and the other of radius 2R, both have same surface charge density s. They are brought in contact and seprated. What will be new surface charge densitites on them ?

Two metal spheres, one fo radius R and the other of radius 2R, both have same surface charge density s. They are brought in contact and seprated. What will be new surface charge densitites on them ?

A hemispherical bowl of radius R carries a uniform surface charge density sigma . Find the potential at the topmost point A, taking potential at infinity to be zero.

Three concentric spherical metal shells A.B.C of radii a,b,c (c gt b gt a) have surface charge density +sigma, - sigma and +sigma respectively. The potential of the middle shell is (sigma)/(epsilon_(0)) times

Electric field at the centre of uniformly charge hemispherical shell of surface charge density sigma is (sigma)/(n epsi_(0)) then find the value of n .

Two concentric spheres of radii R and r have similar charges with equal surface charge densities (sigma) . The electric potential at their common centre is