The formula fe = kq1q2/r^2 represents the magnitude of the electrostatic force (fe) between two point charges (q1 and q2) separated by a distance (r). The constant k is known as the Coulomb's constant and its value is 8.99 x 10^9 Nm^2/C^2.
The electrostatic force between two charges is inversely proportional to the square of the distance between them. This means that as the distance increases, the force decreases and vice versa.
The unit of measurement for the electrostatic force is Newton (N), which is the same unit used for measuring force in general.
Yes, the formula can be used for charges of any magnitude, as long as the charges are in the same units (Coulomb) and the distance is in meters.
The direction of the electrostatic force is determined by the sign of the charges. If the charges are of the same sign (both positive or both negative), the force will be repulsive and if the charges are of opposite signs, the force will be attractive. The direction of the force is along the line connecting the two charges.