Question

The insulated spheres of radii $R_{1}$ and $R_{2}$ having charges $Q_{1}$and $Q_{2}$ respectively are connected to each other. There is

• A. No change in the energy of the system
• B. An increase in the energy of the system
• C. Always a decrease in the energy of the system
• D. A decrease in the energy of the system unless $Q_{1}R_{2} = Q_{2}R_{1}$

Answer 1

Answer: (D)

A decrease in the energy of the system unless $Q_{1}R_{2} = Q_{2}R_{1}$

Answer 2

When $\frac{Q_{1}}{R_{1}} \neq \frac{Q_{2}}{R_{2}};$ current will flow in connecting wire so that energy decreases in the form of heat through the connecting wire.