Coulomb’s Law Calculator

Formula Used:

The electrostatic force (\( F \)) between two charges is calculated using Coulomb’s Law:

\[ F = k \cdot \frac{q_1 \cdot q_2}{r^2} \]

Where:

• \( F \): Electrostatic force (N, Newtons)
• \( k \): Coulomb’s constant (\( 8.99 \times 10^9 \, \text{N·m}^2/\text{C}^2 \))
• \( q_1 \): Charge of the first object (Coulombs)
• \( q_2 \): Charge of the second object (Coulombs)
• \( r \): Distance between charges (meters)

Example: If \( q_1 = 2 \times 10^{-6} \) C, \( q_2 = 3 \times 10^{-6} \) C, and \( r = 0.5 \) m, then:

\[ F = 8.99 \times 10^9 \cdot \frac{(2 \times 10^{-6}) \cdot (3 \times 10^{-6})}{0.5^2} = 0.2158 \, \text{N} \]

The force is attractive if the charges are opposite and repulsive if they are the same.