A 2 μ F capacitor is charged as shown in the figure. The percentage of its stored energy dissipated as heat after the switch S is turned to position 2 is

Question

A 2 μ F capacitor is charged as shown in the figure. The percentage of its stored energy dissipated as heat after the switch S is turned to position 2 is, 0 %, 20 %, 75 %, 80 %

MARKS App · Accepted Answer

E i n i t i a l = Q 0 2 2 C = 1 2 C V 0 2 = V 0 2 Final energy E ( f ) = Q 0 2 2 C e f f E ( f ) = 1 2 × 2 v 0 10 × 2 v 0 = v 0 2 5 Δ E ( l o s s ) = 4 v 0 2 5 , % loss = 4 5 v 0 2 v 0 2 × 100 Δ E ( l o s s ) % = 80 %

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