A metal ball of radius `a` is surrounded by a thin concentric metal shell of radius `b`. The space between these electrodes is filled up with a poorly conducting homogenous medium of resistivity `rho`. Find the resistance of the interelectrode gap. Analyse the obtained solution at `b rarr oo`.

There are two concentric spheres of radius (a) and (b) respectively. If the space between them is filled with medium of resistivity rho , then the resistance of the intergap between the two spheres will be

There are two concentric spheres of radius a and b respectively. If the space between them is filled with medium of resistivity rho , then the resistance of the intergap between the two spheres will be (Assume bgta )

A metallic spherical shell of radius r_1 is surrounded by another concentric metallic spherical shell of radius r_2 . The space between the two shells is filled with a dielectric of dielectric constant K. If a charge Q is given to the inner shell, the charge appearing on the outer surface of the outer shell is

Two concentric spheres of radii a and b have a space in between the spheres which is filled with a material of resistivity rho . Resistance of the intermediate material is

A metal ball of radius a is located at a distance l from an indinite ideally conducting plane. The space around the ball is filled with a homongeous poorly conducting medium with resistivity rho . In the case of a lt lt l find : (a) the current density at the conducting plane as a function of distance r from the ball if the potentail difference between the ball and the plane is equal to V , (b) the electric resistance of the medium between the balll and the plane.

Two metal balls of the same radius a are located in a homongenous poorly conducting medium with resistivity rho . Find the resistance of the medium between the balls provided that the separation between them is mush greater than the radius of the ball.

Two metal balls of the same radius a are located in a homongenous poorly conducting medium with resistivity rho . Find the resistance of the medium between the balls provided that the separation between them is mush greater than the radius of the ball.

A spherical metallic electrode has a radius 8 cm. It is concentric with a spherical metal shell of radius 10 cm. The inner space is filled with an insulator of resistivity 10^-4Omega-m . So, the resistance of the insulator is