Question

Two insulated metallic spheres of 3mF and 5mF capacitances are charged to 300 V and 50 V respectively. The energy loss, when they are connected by a wire, is-

• A. 0.012 J
• B. 0.0218 J
• C. 0.0585 J
• D. 3.75 J

Answer 1

Answer: (C)

0.0585 J

Answer 2

DU = $\frac { \mathrm { C } _ { 1 } \mathrm { C } _ { 2 } } { 2 \left( \mathrm { C } _ { 1 } + \mathrm { C } _ { 2 } \right) }$ (V₁ – V₂)²