A point charge is an idealized model in physics that represents a charged particle with negligible size. It is used to simplify calculations in electrostatics, where the charge is treated as concentrated at a single point in space. This concept helps in understanding the electric field and force generated by the charge. In the context of Coulomb's Law, a point charge can exert a force on other charges located nearby. The strength of this force depends on the magnitude of the charges and the distance between them. Point charges are fundamental in studying electric interactions in various fields, including electromagnetism and circuit theory.