answer is A , but can u explain it pls An air filled parallel plate capacitor is

Question

answer is A , but can u explain it pls

An air filled parallel plate capacitor is charged to a potential difference of 10 V and then disconnected from the battery. If you double the separation between the plates of the charged capacitor, without touching the plates, which of the following statements is correct A) Voltage across the plates will double B) Its capacitance will remain the same C) Energy stored by the capacitor will remain the same D) Its capacitance doubles E) Charge stored reduces to half

Explanation / Answer

C = e0 A / d

d -> doubled

then C-> halved.

capacitor is disconnected from battery so charges on plates will not change.

Q = C V = constant

now C -> halved then V-> doubled.

Ans(A)

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