Work and Energy in an Isolated Capacitor
A parallel-plate capacitor with an initial capacitance C is charged to a voltage V₀ and then isolated. An external agent performs work W to increase the plate separation, resulting in a new capacitance of C/3. What is the relationship between the work W and the initial energy U₀ stored in the capacitor?
A
W = U₀
B
W = 2U₀
C
W = 3U₀
D
W = U₀/2
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