Question

some natural phenomena
Q. There are 2 kinds of charges. How do we know this?

Answer 1

WE CAN INDENTIFY THESE BY THE VARIOUS WAYS.
1. BY ELECTROMAGNETISM MACHINES
2. BY TOUCHING THAT

Answer 2

there are two types charge they are positive charge and negative charge
we known useually that the around of wire there was a presences of magnetic field due to the flow of currrent which is also known that the electron are there which are negative charge will attached us because our body has positive charge