In the Electro-Balls demo, we use either a Wimshurst or Dirod generator to get the balls to move. What is special about these generators, that makes them useful for this demo?  When working with the various electric motors and other small demos, we use the Hand Crank Electrostatic Generator. What is special about this generator, in regard to these demos. In the Group Work activity, we use a charged sphere to charge another sphere by induction. Briefly, how does this process differ from charging by conduction? When we rub the dissimilar Charge Producer paddles together, what results should we see when they are measured? How do we charge by conduction, and what is the result? In the Group Work exercise, we charge up the Faraday Cup, and then measure the charge at various points on and in the cup. What do we find, and why? Opposite electric charges are highly attracted to each other, so it requires work to pull them apart. How do our various electrostatic generators perform work? When we place the two spheres in contact with each other (charged), what do we find? In the demo with the hanging ball and the Van de Graaff generator, once the ball touches either the VDG sphere or the smaller discharger sphere, the hanging ball bounces off. Why is this? The Electrophorus is an example of inductive charging.