A charge particle `'q'` lies at the centre of two concentric hollow sphere of inner radii `R` and `3R` and outer radii `2R` and `4R` respectively. What amount of work has to be performed to slowly transfer the charge `'q'` from center rough the orifice to infinity.

A point charge q is located at the centre O of a spherical uncharged coducting layer provided with small orifice. The inside and outside radii of the layer are equal to a and b respectively. The amount of work that has to be performed to slowly transfer the charge q from teh point O through the orifice and into infinity is

A point charge q is located at the centre O of a spherical uncharged coducting layer provided with small orifice. The inside and outside radii of the layer are equal to a and b respectively. The amount of work that has to be performed to slowly transfer the charge q from teh point O through the orifice and into infinity is

Two concentric conducting shells of radii R and 2R are having charges Q and -2Q respectively.In a region r

A hollow conducting sphere of inner radius r and outer radius 2R is given charge Q as shown in figure, then the

A charge 'Q' is distributed over two concentric hollow spheres of radii 'r' and 'R' (gtr) such that the surface densities are equal. Find the potential at the common centre.