APFIVE Work and Energy in an Isolated Capacitor
A parallel plate capacitor with capacitance C is charged to voltage V₀ and disconnected. If an external agent does work W to increase the plate separation until the capacitance is C/3, what is the relationship between W and the initial stored energy U₀?
A
W = 3U₀
B
W = U₀/2
C
W = 2U₀
D
W = U₀
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