Question

A solid conducting sphere having net charge Q and radius 3a contains a hollowed spherical region of radius 2a. A point charge + Q is placed at a point a distance from the common centre of the sphere what is the magnitude of the electric field at the point r= 4 a from the centre of the sphere as marked in the figure by P​

Answer 1

Explanation:

A solid uncharged conducting sphere has radius 3a contains a hollowed spherical region of radius 2a. A solid uncharged conducting sphere has radius 3a contains a hollowed spherical region of radius 2a. A point charge +Q is placed at a position a distance a from the common center of the spheres.