Answers Crowley Credit Recovery Physics B Unit Test — Unit testQuestion 1

1

QuizMultiple Choice

Unit Test — Unit test

Question 1 • Crowley Credit Recovery Physics B

How does a rubber rod become negatively charged through friction?

Answer

A

It touches a negatively charged object, and protons move off of the rod.

B

It touches a positively charged object, and electrons move onto the rod.

C

It is rubbed with another object, and electrons move onto the rod.

D

It is rubbed with another object, and protons move off of the rod.

Explanation

Friction can transfer electrons between two materials. A rubber rod becomes negatively charged when it gains electrons from the object it is rubbed against. Protons remain bound in the atoms’ nuclei, so they do not move off the rod during this process.

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