What happens when a negatively charged balloon is brought near a wall?

When a negatively charged balloon is brought close to a wall, it is attracted to the wall due to the presence of positive charges in the wall. Since the balloon has a negative charge, it will induce polarization in the wall's surface. This means that the negative charges in the wall will be pushed away slightly, while the positive charges (or areas with a deficiency of electrons) will be attracted towards the negatively charged balloon. This generates an attractive force between the balloon and the wall, leading to the balloon being pulled towards the wall.

The wall itself typically does not have a net charge, but the presence of the negatively charged balloon causes a redistribution of charge within the wall's structure, ultimately resulting in an attraction. This phenomenon illustrates how oppositely charged particles attract each other, demonstrating a basic principle of electrostatics.