Electric potential is a fundamental concept in understanding the behavior of electric fields. It refers to the amount of electric potential energy per unit charge at a particular point in space. The electric potential at a point is determined by the influence of nearby charges and is measured in volts (V).

To calculate the electric potential at a point due to a single point charge, we can use the formula: V = k * q / r, where V is the electric potential, k is the electrostatic constant (9 x 10^9 Nm^2/C^2), q is the magnitude of the charge, and r is the distance between the point and the charge.

When dealing with multiple charges, the electric potential at a point can be determined by summing the contributions from each individual charge. We calculate the electric potential due to multiple charges by adding the potentials due to each charge using the principle of superposition.

For example, let's say we have two point charges, q1 and q2, located at positions r1 and r2 respectively. The electric potential at a point P can be calculated as V = k * (q1 / r1 + q2 / r2).