Question

Two glass rods are rubbed together. One of the glass rods are brought near (but
does not touch) an uncharged pith ball. Would you expect the pith ball to attract,
repel, or do nothing? Explain why.

Answer 1

Answer:

Do Nothing

Explanation:

Charges are transferred by friction when two different types of bodies are rubbed together. This is known as charging by friction.

However, when two materials of the same type are rubbed together, no charge is transferred from one object to the other hence there is no transfer of charges by friction and none of the two glass rods are charged.

Therefore, when one of the glass rods is brought close but does not touch the pith ball, nothing happens.