<aside> 🔌

The force between two point charges is given as $F_E = \frac{kq_1q_2}{r^2}$

</aside>

• Coulomb's constant, $k$, is equal to $8.9910^9 \frac{Nm^2}{C^2}$
  • Coulomb's law applies to point charges and to charges that can be concentrated equivalently in point located at the centre, when the sizes of the charges are much smaller than their distance of separation
  • There are similarities between the electric force and gravitational force

The superposition principle states that the total force acting on a charge $q$ is the vector sum, or superposition, of the individual forces exerted on $q$ by all the other charged in the problem