Electrostatics-Forces Between Two Point Charges (KVPY Stream SB-SX (Class 12 & 1st Year BSC) Physics): Questions 1 - 1 of 1
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Question number: 1
» Electrostatics » Forces Between Two Point Charges
Appeared in Year: 2013
Consider an initially neutral hollow conducting spherical shell with inner radius r and outer radius 2r. A point charge + Q is now placed inside the shell at a distance from the centre. The shell is then grounded by connecting the outer surface to the earth. P is an external point at a distance 2r from the point charge + Q on the line passing through the centre and the point charge + Q as shown in the figure.
The magnitude of the force on a test charge + q placed at P will be –