Potential energy of a system of two point charges
$$W = \frac{k\cdot q0\cdot q}{\varepsilon\cdot r}$$
W - potential energy
k - proportionality coefficient
q0, q - charges
ε - dielectric constant (permittivity)
r - distance
k - proportionality coefficient
q0, q - charges
ε - dielectric constant (permittivity)
r - distance
Find
It is known that:
= 