Question

what is point charge ?????​

Answer 1

A point charge is a hypothetical charge located at a single point in space. While an electron can for many purposes be considered a point charge, its size can be characterized by length scale known as the electron radius..

Answer 2

A point charge is an electric charge. When the linear sizes of charged bodies are much smaller than the distance between them, their sizes may be ignored and the charged bodies are called point charges.