Asked by ruth

what is the potential energy of 4 point charges each of value Q at the corners of a square of side length a.

Answers

Answered by Damon
potential energy is a function of distance from the charges. Where do you want it?
Answered by ruth
at the centre or one of corners
Answered by Damon
Well, at a corner it is infinite since we have that division by zero problem when r = 0

at the middle, find the potential of one of them at a distance of (a/2)sqrt 2

The neat thing about potentials is that they add like scalars. Just multiply by 4.

Answered by ruth
so it will be kq(4Q/a/2)
Answered by Damon
Suspect so :)
Answered by tanu
4kqq/r^2
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