Question: The potential difference between a pair of oppositely charged parallel plates is 400 V. (a) If the spacing between the plates is doubled without altering

The potential difference between a pair of oppositely charged parallel plates is 400 V.
(a) If the spacing between the plates is doubled without altering the charge on the plates, what is the new potential difference between the plates?
(b) If the plate spacing is doubled while the potential difference between the plates is kept constant, what is the ratio of the final charge on one of the plates to the original charge?

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