A capacitor when charged by a potential difference of 200 volt, stores a charge of 0.1 C. By discharging, energy liberated by the capacitor is :

Question

A capacitor when charged by a potential difference of 200 volt, stores a charge of 0.1 C. By discharging, energy liberated by the capacitor is : (A) -30 J (B) -15 J (C) 10 J (D) 20J

Tardigrade Admin · Accepted Answer

Given: V=200 volt, Q=0.1 coulomb Energy liberated U=(1/2)QV =(1/2)× 0.1× 200 =10J

Q. A capacitor when charged by a potential difference of 200 volt, stores a charge of 0.1 C. By discharging, energy liberated by the capacitor is :

-30 J

-15 J

10 J

20J

Given: $V = 200$ volt, $Q = 0.1$ coulomb Energy liberated $U = \frac{1}{2} Q V$ $= \frac{1}{2} \times 0.1 \times 200$ $= 10 J$

Q. A capacitor when charged by a potential difference of 200 volt, stores a charge of 0.1 C. By discharging, energy liberated by the capacitor is :

-30 J

-15 J

10 J

20J

Given: V=200 volt, Q=0.1 coulomb Energy liberated U=21​QV =21​×0.1×200 =10J

Given: $V = 200$ volt, $Q = 0.1$ coulomb Energy liberated $U = \frac{1}{2} Q V$ $= \frac{1}{2} \times 0.1 \times 200$ $= 10 J$