Final answer:
To charge a pith ball, you can use contact charging or induction.
Step-by-step explanation:
To charge a pith ball, you can use the process of contact charging. This involves rubbing the pith ball with a material that allows for the transfer of electrons. For example, you can rub the pith ball with a piece of fur or a plastic rod. When the pith ball comes in contact with the material and is rubbed, electrons are transferred from one object to the other, resulting in the pith ball becoming charged.
Another method to charge a pith ball is by induction. This involves bringing a charged object near the pith ball without making direct contact. The charges in the pith ball are rearranged due to the influence of the charged object, resulting in the pith ball becoming charged.