# Static electricity problem

Take the following diagram and explanation:

I have two questions:

1. Why is the table tennis ball with metal paint attracted to the positively charged rod. Although the negative charges move closer to the positively charged rod, isn't the ball still electrically neutral. So why is it still attracted? Is it because the negative charges are now closer to the rod, so that attraction is now greater than the repulsion between like charges, or something along those lines.

2. If the two objects were close together, and for a brief moment, a grounding wire touched the ball, what would happen? In the answers it says the negative charges would flow up the earth wire. But why is this the case? Shouldn't electrons instead flow down to Earth.

• Yes, your answer is correct for the first question but for the second one you are wrong. Electrons will not flow to the earth since they are already bound to the positive charge of the rod. So, it will be the electrons from the earth that will come and neutralize the positive half of the ball making it negative finally. Jul 8, 2022 at 13:02