Q. Two conducting 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 $Q_{1}R_{2} = Q_{2}R_{1}$
Explanation
(d) 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
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.