Electrostatic potential around a point charge
$$\phi = \frac{k\cdot q0}{\varepsilon\cdot r}$$
φ - potential
k - proportionality coefficient
q_0 - charge
ε - dielectric constant (permittivity)
r - distance
k - proportionality coefficient
q_0 - charge
ε - dielectric constant (permittivity)
r - distance
Find
It is known that:
= 