Question

Three concentric conducting spherical shells $A,B$ and $C$ with charge $Q$ (inside $A$), $2Q$ (outer face of $B$) and $3Q$ (outer face of $C$) and radius $R,2R$ and $4R$ are placed as shown in figure. Energy stored between shell $A$ and $B$ is

• A. $0$
• B. $\frac{Q^2}{\pi {\epsilon }_{0}R}$
• C. $\frac{Q^2}{2\pi {\epsilon }_{0}R}$
• D. $\frac{Q^2}{16\pi {\epsilon }_{0}R}$

Answer 1

The correct option is A $0$

Charge distribution is as shown in the figure.




As there is no charge on the outer surface of $A$ and inner surface of $B$. There is no electric field between them. Hence no energy is stored between these plates.