Three long concentric conducting cylindrical shells have radii `R,2R` and `2sqrt(R )`. Inner and outer shells are connceted to each other. The capacitance across middle and inner shells per unit length is:

Three long concentric conducting cylindrical shells have radii R,2R and Rsqrt(2 ) . Inner and outer shells are connceted to each other. The capacitance across middle and inner shells per unit length is:

Three long concentric conducting cylindrical shells have radii R, 2R and 2sqrt2 R Inner and outer shells are connected to each other. The capacitance across middle and inner shells per unit length is:

There are two concentric conducting spherical shells of radii 10 cm and 20 cm. The outer shell is charged to a potential of 50esu while inner shell is earthed. The charge on outer shell is

There are two concentric conducting spherical shells of radii 10 cm and 20 cm . The outer shell is charged to a potential of 50esu while inner shell is earthed. The charge on outer shell is

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

Two concentric spherical conducting shells of radii r and R (r lt R ) carry charges q and Q respectively . The two shells are now connected by a conducting wire. The final charge on the inner shell is

There are two concentric hollow conducting spherical shells of radii r and R ( R gt r) . The charge on the outer shell is Q. What charge should be given to the inner shell, so that the potential at a point P , at a distance 2R from the common centre is zero ?

There are two concentric hollow conducting spherical shells of radii r and R ( R gt r) . The charge on the outer shell is Q. What charge should be given to the inner shell, so that the potential at a point P , at a distance 2R from the common centre is zero ?