potential energy system

Question

Potential energy of two point charges q and q separated by r is:

RankGuru · Accepted Answer

The electrostatic potential energy ($U$) of a system of two point charges is the work required to assemble them from infinity.
$U = k \frac{q_1 q_2}{r}$
- For two identical charges $q$:
$U = \frac{k q^2}{r}$

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potential energy system

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