The formula for calculating the force between two point charges is F = k * (q1 * q2)/r^2, where F is the force in Newtons, k is the Coulomb's constant (9 x 10^9 N * m^2/C^2), q1 and q2 are the magnitudes of the two point charges in Coulombs, and r is the distance between the two point charges in meters.
The direction of the force between two point charges is determined by the charges themselves. Like charges (both positive or both negative) repel each other and the force acts away from each charge. Unlike charges (one positive and one negative) attract each other and the force acts towards each charge.
Yes, the formula can be used to calculate the force on multiple point charges. However, the force between each pair of charges must be calculated separately and then vectorially added together to find the total force.
The force between two point charges is inversely proportional to the square of the distance between them. This means that as the distance between the charges increases, the force decreases and vice versa.
Yes, force on point charges is measured in Newtons (N), which is the SI unit for force. In some cases, electron volts (eV) may also be used as a unit of force on point charges.