In the circuit shown, the cell is ideal, with emf = 15 V. Each resistance is of 3Ω. The potential difference (in V) across the capacitor is :-

Question

G1 Physics · Accepted Answer

Use Q = CV, U = ½CV² and C = εA/d; reduce the capacitor network by series/parallel combination and apply charge conservation where a node is isolated. Substituting the given values gives 12.