Practice Quiz

MCAS Physics Exam Practice

Category - Introductory Physics

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Why does a plastic rod have a negative charge after being rubbed with a piece of fur?
  1. The fur gives up protons to the rod.
  2. The rod gives up electrons to the air.
  3. The fur gains protons from the rod.
  4. The rod gains electrons from the fur.
Explanation
Answer: D - The rod gains electrons from the fur.
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