Question

A balloon gets negatively charged by rubbing ceilings of a wall.

• A. The balloon sticks to the ceiling forever.
• B. The balloon eventually fall off the ceiling.
• C. The balloon does not stick to the ceiling at all.
• D. The balloon charges the ceiling negatively.

Answer 1

The correct option is B The balloon eventually fall off the ceiling.

The balloon is negatively charged on rubbing with the wall means that on rubbing, the balloon collects electrons from the wall and making it negative in respect to the wall and therefore it clings to the wall, while clinging to the wall, the electrons on the balloon leaks off the balloon and eventually leaves. The balloon at the same potential as the wall, thus when the attraction between the balloon and wall is less than the weight of the balloon, the balloon eventually falls off.