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

Options

A. No change in the electrical energy of the system
B. An increase in the electrical energy of the system
C. Always a decrease in the electrical energy of the system
D. A decrease in electrical energy of the system until `Q_(1) R_(2)= Q_(2)R_(3)`

Answer

D

Explanation

Charge will flow until potential are equal and flow energy is decrease
`(Q_(1))/(C_(1))= (Q_(2))/(C_(2)) rArr Q_(1)R_(2)= Q_(2)R_(1)`