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 ?