What is electric charge ? Is it scalar or vector ?

What is Greek meaning of electrics ?

A charged gold leaf electroscope has its leaves apart by certain amount having enclosed air. When the electroscope is subjected to $X$-rays, then the leaves

By which instrument, the charge on object can be detected ?

Discuss the method of charging of two spheres by without contact method.

When a body is earth connected, electrons from the earth flow into the body. This means the body is…..