Question

Charged plastic and glass rods hang by threads.

a. An object repels the plastic rod. Can you predict what it will do to the glass rod? If so, what? If not, why not?

b. A different object attracts the plastic rod. Can you predict what it will do to the glass rod? If so, what? If not, why not?

Short answer

a. an object that repels, when plastic will be attracted to glass.

b. an object that attracted to plastic should repel glass of same charges will repel each other.

Step-by-step solution

Given information

Charged plastic and glass rods hang by threads. they are kept at small distance.

Explanation (part a)

If plastic is charged negatively and glass is charged positively, then an object that repels plastic will be attracted to glass.

Explanation (part b)

The object attracted to plastic should repel glass. Because the objects of same charges are repel each other eventhough it is different objects.