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A square of particles
Four particles are attached to the four corners of a square whose edge measures L (see image). Particles A and B each have a positive charge q and particles C and D each have a negative charge -q.

(a) What is the electrical potential energy of the system?

(b) Is this energy positive or negative?

A
L
Java
oumb
TUO
O
Teners B
%
L

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