Question

How is the energy stored in a capacitor affected, if the distance between the plates is halved?

It seems to me it should double, but apparently it halves. Can someone explain why and how that world?

Answer 1

The ebergy stored in a capacitor is E=(CV^2)/2. and \[C=\epsilon _{0}\epsilon _{r}A/d\] If distance d decrease then the value of C increase so that the amount of energy can be stored in capacitor increases.

Answer 2

yea it doubles for sure.. !