Question

The image on the left shows the charges on a balloon after it’s been rubbed with a wool cloth. The image on the right is a piece of tissue paper. What will happen to the tissue paper as it approaches the balloon and why?

Answer 1

Answer: The tissue paper will stick to the balloon because it is positively charged.

Explanation:

When the balloon is rubbed with a wool cloth, then the balloon will have more negative charges than the positive charges.

There is no charge on the tissue paper. It is neutral. When it approaches to the balloon then the additional negative charge on the balloon will attract the positive charge in the tissue paper.

The tissue paper will stick to the balloon because it is positively charged.

Answer 2

When wool is rubbed with a balloon, the wool is left with a positive charge as electrons have travelled from the wool to the balloon which means the balloon now has a negative charge.

Now that the balloon has a negative charge, you need to know:
The tissue paper originally contains electrons and protons
The fact that the balloon has a negative charge, it will ATTRACT protons because protons are POSITIVE and electrons are NEGATIVE.
So once they are attracted, they will move closer to one another.