JEE Main20207 Jan 2020Evening ShiftPhysicsCapacitanceActual
A 60 p F capacitor is fully charged by a 20 V supply. It is then disconnected from the supply and is connected to another uncharged 60 p F capacitor in parallel. The electrostatic energy that is lost in this process by the time the charge is redistributed between them is (in n J ) ________
Correct answer
0
Step-by-step solution
V 0 = 20 V Heat loss = U i - U t = 1 2 C v o 2 - 2 1 2 C V 0 2 2 = C V o 2 4 = 60 × 10 - 12 20 2 4 J = 6 × 10 - 9 J = 6   n J