Question

where do the two kinds of charges come from?

Answer 1

In other words, like charges repel each other while opposite charges attract each other. The closer together the charges are, the stronger the electrostatic force between them. The word “electron” comes from the Greek word for amber.

Answer 2

1.There are two kinds of charge, positive and negative.
2. Like charges repel, unlike charges attract.
3. Positive charge comes from having more protons than electrons; negative charge comes from having more electrons than protons.

Hope it helps...