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CGP EDU Academic Team
Published on: September 12, 2026
A variable condenser is permanently connected to a 100 $V$ battery. If the capacity is changed from $2 \mu F$ to $10 \mu F$ , then change in energy is equal to
Text Solution
Verified by ExpertsThe correct answer is:
D
$\Delta U = U_2 - U_1 = \frac{V^2}{2} (C_2 - C_1)$
$= \frac{(100)^2}{2} (10 - 2) \times 10^{-6} = 4 \times 10^{-2} J$
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