Understanding Electric Charges and Fields

The electric field strength decreases as you move away from a point charge.

The force is $$27 \times 10^9$$ N, calculated using Coulomb's law: $$F = k \frac{{|q_1 q_2|}}{{r^2}}$$ where k is Coulomb's constant.

The SI unit of electric charge is the Coulomb.

Point away from the charge.

Like charges repel each other.

Coulomb's Law states that the force between two point charges is directly proportional to the product of the magnitudes of the charges and inversely proportional to the square of the distance between them.

The formula is $$E = k \frac{{|Q|}}{{r^2}}$$ where k is Coulomb's constant and r is the distance from the charge.

The electric field lines point towards the negative charge.

The principle of superposition states that the total electric field created by multiple charges is the vector sum of the electric fields created by each charge individually.

The electric field is the negative gradient of the electric potential: $$E = -\nabla V$$ .