A thin sphericalal 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 at a distance r / 2 from the centre of the shell is
A thin sphericalal 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 at a distance r / 2 from the centre of the shell is










