Question

A thick shell with inner radius R and outer radius 3R has uniform density p c/m². It has a spherical
cavity of radius R as shown in the figure. The electric field at the centre O1, of the cavity is :-
where O1 is center of cavity which radious r and it's distance from center of big shell which radious 3r is 2r​

Answer 1

Explanation:

inner radius =R

outer radius =3R

charge density =C/m

3

Spherical cavity of radius =R

Due to the equipotential surface, the centre has no electric field hence E

centre

=0

solution