Final answer:
The principle of superposition of electrostatic force states that the total force on a charge is the sum of the forces exerted by all other charges individually.
Step-by-step explanation:
The principle of superposition of electrostatic force entails that the total force on a charge is the sum of the forces exerted by all other charges individually. This means that the net electric force on a test charge can be calculated by adding up the forces on it from each source charge. It is important to note that these forces are vectors, meaning they have both magnitude and direction.