Question

What will happen if I touch the electroscope rod with a negatively charged rubber rod? Why?

A. Nothing, because both foil leaves end up with equal amounts of negative charge.
B. Nothing, because you didn't touch the leaves with the rod, so they don't become charged.
C. The foil leaves will stick together. Because negative charge attracts.
D. The foil leaves will separate. Because like charges repel.

Answer 1

When the electroscope rod is touched with a negatively charged rubber rod, the foil leaves will separate due to the repulsion between the negative charges on the rubber rod and the negative charges on the leaves.

Step-by-step explanation:

When you touch the electroscope rod with a negatively charged rubber rod, the foil leaves will separate because negative charges on the rubber rod repel the negative charges on the foil leaves. This is because like charges repel each other. The negative charge on the rubber rod induces a positive charge on the leaves, causing them to repel and separate.