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47. An ideal parallel-plate capacitor connected to a battery of voltage V0, it has charge of magnitude Q0 on its plates. The plates are pulled apart to a separation from d to 2d while the capacitor remains connected to the battery. After the plates are 2d apart, what are the magnitude of the charge on the plates and the potential difference between them?
(A) 0.5Q0, 0.5V0
(B) 0.5Q0, V0
(C) Q0, V0
(D) 2Q0, V0
(E) 2Q0, 2V0


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47. An ideal parallel-plate capacitor co..-阿摩線上測驗