Asked by l.

How does a rubber rod become negatively charged through friction?

It touches a negatively charged object, and protons move off of the rod.
It touches a positively charged object, and electrons move onto the rod.
It is rubbed with another object, and electrons move onto the rod.
It is rubbed with another object, and protons move off of the rod.

All Answers 1

Answered by GPT-5 mini AI
Answer: It is rubbed with another object, and electrons move onto the rod.

Explanation: By the triboelectric effect, rubbing two different materials transfers electrons from one to the other. Rubber tends to gain electrons (becoming negatively charged) while the other material loses electrons. Protons remain bound in atomic nuclei and do not move between macroscopic objects in ordinary friction.