A metallic spherical shell of radius R has a charge -Q on it. A point charge +Q is placed at the centre of the shell. Which of the graphs shown below may correctly represent the variation of electric field E with distance r from the centre of shell ?

Which one of the following graphs represents the variation of electric field with distance r from the centre of a charged spherical conductor of radius R?

Which one of the following graphs represents correctly represent the variation of the gravitational field (E) with the distance (r) from the centre of a spherical shell of mass M radius R ?

Draw a graph of electric field E(r) with distance r from the centre of the shell for 0 le r le 0 .

A spherical shell of radius R has a charge +q units. The electric field due to the shell at a point

A charge Q is placed at the centre of a spherical conducting shell. Choose the correct option.

A thin spherical conducting shell of radius R has a charge q. Another charge Q is placed at the centre of the shell. The electrostatic potential at a point P a distance R/2 from the centre of the shell is

A thin metallic spherical shell contains a charge Q on it. A point charge q is placed at the centre of the shell and another charge q_(1) is placed outside it as shown in figure. All the three charges are positive The force on the charge at the centre is