van de graaf generator practical explanation (non-contact forces)
electrons move up through the insulating belt and charge builds up and discharges in a spark to the metal sphere and grounds through the earth connection.
the field produced by a charged object takes up space around the object
for another charged object to experience a force, it does not have to be in contact with the first object, it just needs to be in its field, that's why the electric force is a non-contact force
