Physics

Problem

Which one of the following expressions gives the magnitude of the electrostatic force between two point charges

q_1

and

q_2

separated by a distance

r

in vacuum? a)

F=\dfrac{\mu_0}{4\pi}\dfrac{q_1 q_2}{r^{2}}

F=\dfrac{1}{4\pi\varepsilon_0}\dfrac{q_1 q_2}{r^{2}}

F=\dfrac{1}{4\pi\varepsilon_0}\dfrac{q_1 q_2}{r}

F=\dfrac{1}{\varepsilon_0}\dfrac{q_1 q_2}{r^{2}}