Coulomb’s law (AQA A-Level Physics): Flashcards

$\propto Q_1 Q_2$; $\propto \frac{1}{r^2}$

$F = \frac{1}{4\pi \varepsilon_0} \frac{Q_1 Q_2}{r^2}$

Permittivity of free space

The two charges

Distance between centres of the charges

Can be approximated as a vacuum

Charge acts from the centre of the sphere

Repulsive

Attractive

$1.24 \times 10^{36}$ times stronger