A charge Q is kept  in the inner cavity and a charge 2 Q is  given to the inner shel. A charge  3 Q
Channel: Doubtnut
Date: 16/08/2020

A charge Q is kept  in the inner cavity and a charge 2 Q is  given to the inner shel. A charge  3 Q  is given  to the outermost shell, as shown in Fig. 1 (a).22 Find the charges at the surfaces A,B and C.