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Question
When a glass rod is rubbed against silk, which of the following statements is true?
  1. Electrons are removed from the silk.
  2. Electrons are removed from the rod.
  3. Protons are removed from the silk.
  4. Protons are removed from the rod.
Question by OpenStax is licensed under CC BY 4.0.
Final Answer

(b)

Solution Video

OpenStax College Physics Solution, Chapter 18, Problem 1 (Test Prep for AP® Courses) (0:24)

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Video Transcript
This is College Physics Answers with Shaun Dychko. The textbook tells us that when a glass rod is rubbed with silk, the glass rod becomes positive and the silk becomes negative. And so this means, electrons are removed from the rod so that there are more protons on the rod than there are electrons. And so it becomes positive and electrons must be removed to do that.