A point charge q is placed at a distance of `r` from the centre O of an uncharged spherical shell of inner radius R and outer radius 2R. The electric potential at the centre of the shell will be

A point charge is placed at a distance 2 a from the centre of a thin conducting uncharged spherical shell A of radius 'a' as shown in the figure.Then the charge on the shell will be qquad (1)/(=)

A point charge +q is placed at the centre of a conducting spherical shell of inner radius a and outer radius b. Find the charge appearing on the inner and outer surface of the shell.

A point charge q is placed inside a conducting spherical shell of inner radius 2R and outer radius 3R at a distance of R fro the centre of the shell. The electric potential at the centre of shell will (potential at infinity is zero).

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 is placed at a distance 2 a from the centre of a thin conducting uncharged spherical shell A of radius 'a' as shown in the figure.Then the charge on the shell will be

A point charge is placed at a distance 2 a from the centre of a thin conducting uncharged spherical shell A of radius 'a' as shown in the figure.Then the charge on the shell will be

A point charge +q is held at a distance R from the centre of an uncharged spherical conductor of radius a(a lt R) . Calculate the potential of the conductor in the presence of q.

A point charge q'q is placed at distance 'a' from the centre of an uncharged thin spherical conducting shell of radius R=2a. A point 'P' is located at a distance 4a from the centre of the conducting shell as shown. The electric potential due to induced charge on the inner surface of the conducting shell at point 'P' is