PHY-102-R-ElectricityandMagnetismExercises 2019 11-15.docx - PHY-102 Electricity and Magnetism Exercises 11 When a plastic rod is rubbed with fur the

PHY-102-R-ElectricityandMagnetismExercises 2019 11-15.docx...

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PHY-102: Electricity and Magnetism Exercises 11. When a plastic rod is rubbed with fur, the rod will become negatively charged. Which of the following best explains how this happens? A. Electrons are transferred from the plastic rod to the fur. B. Electrons are transferred from the fur to the plastic rod. C. Negative charges are created on the plastic rod. D. Positive charges are removed from the plastic rod. 12. What is characteristic of a good insulator? A. Electrons are usually not moving at all. B. Electrons are free to move around. C. Electrons are semi-free to move around. D. Electrons are tightly bound to the nuclei. 13. In a solid conductor such as a metal, what is the cause of an electric current?
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