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Praxis II Physics Content Knowledge Exam Prep

Category - Praxis II Physics Content Knowledge Test Prep

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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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