Can someone help me work this out? I really need an explaination as opposed to j

Question

Can someone help me work this out? I really need an explaination as opposed to just an answer. Thanks!!!

A battery fully charges a parallel-plate air-gap capacitor with moveable plates. The battery is then removed and the plates are immediately pulled apart. (With the battery disconnected, the amount of charge on the plates remains constant.) What happens to the potential difference between the plates as they are being separated?

a) It increases.

b) It decreases.

c) It remains constant.

d) There is no way to tell from the information given.

Explanation / Answer

since V = Ed

is if d is increases, E then decrases by a factor square term with distance

so

b)V also decreases.

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