Coulomb's law: extended (AQA A-Level Physics): Quizzes

They attract each other

Induction

Net attractive force

Proportional to $\frac{1}{r^2}$

$8.85 \times 10^{-12}$ F m$^{-1}$

$F = \frac{Q_1Q_2}{4\pi\varepsilon_0 r^2}$

When it has uniform charge distribution

$8.20 \times 10^{-8}$ N

Over $10^{39}$ times larger

$F \propto \frac{1}{r^2}$