A charge +q is placed somewhere inside the cavity of a thick conducting spherical shell of inner radius `R_(1)` and outer radius `R_(2)`. A charge – Q is placed at a distance `r gt R_(2)` from the centre of the shell. Then the electric field in the hollow cavity-

A point charge Q is placed inside a conducting spherical shell of inner radius 3R and outer radius 5R at a distance R from the centre of the shell. The electric potential at the centre of the shell will be

A point charge Q is placed inside a conducting spherical shell of inner radius 3R and outer radius 5R at a distance R from the centre of the shell. The electric potential at the centre of the shell will be

A metallic spherical shell has an inner radius R_(1) and outer radius R_(2) . A charge is placed at the centre of the spherical cavity. The surface charge density on the inner surface is

A metallic spherical shell has an inner radius R_(1) and outer radius R_(2) . A charge is placed at the centre of the spherical cavity. The surface charge density on the inner surface is

A Positive charge Q is placed on a conducting spherical shell with inner radius R_(1) and outer radius R_2 . A particle with charge q is placed at the center of the spherical cavity . The magnitude of the electric field at a point in the cavity , a distance r from center is

A point charge q is placed inside a conducting spherical shell of inner radius 2 R and outer radius 3 R at a distance of R from the center of the shell. Find the electric potential at the center of the shell.

A spherical conducting shell if inner radius R_(1) and outer radius R_(2) has a charge Q. A charge q is placed at the centre of the shell. Write an expression for the electric field at a point XgtR_(2) from the centre of the shell.