Post-UTME Physics 2019 Objective — Question 17
Question 17 of 20 from the Post-UTME Screening (Post-UTME) Physics 2019 Objective paper, with the correct answer and a full explanation.
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Which of the following materials is positively charged?
- A. Ebonite rubbed with fur
- B. Ebonite rubbed with silk
- C. Glass rubbed with fur
- D. Glass rubbed with silkCorrect
Explanation
Glass rubbed with silk loses electrons and becomes positively charged (a classic triboelectric example).
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