moving charges.

U can do some hair rising experiments with a van de Graff generator. This is a machine for building up and storing electric charge, when it´s switched on, negative charge collected on the dump. The dump becomes negatively charge.
STORING CHARGE:
If u stands on a piece of plastic and touches the dump your body collects extra negative charge from the dump. That´s when your hair stands on end. Each hair becomes negatively charge the hairs repeal each other.
LOSING CHARGE:
If u then touch water tap your body loses this charge. Your hair goes back to normal. The charges flow from your body alone the water pipe to the air. You can feel them go, your fingers tingle.
FLOW OF CHARGE:
There are two good wishes of showing this flow of charge. You can connect a neon bull between the generator and the water tap. The bull glows as the charges flow fluid. You can also connect in a meter which meters small electric currents. The flow of charge through the meter makes the meter needle move