When a plastic comb is passed through dry hair, the charge acquired by the comb is
When a plastic comb is passed through dry hair, it always acquires a negative charge. This happens because electrons are transferred from the hair to the plastic comb due to the triboelectric effect. Since hair loses electrons, it becomes positively charged, while the plastic comb gains electrons and becomes negatively charged. Thus, the correct answer is (a) Always negative.
Class 12th Science Physics NCERT MCQ Questions
NCERT Books MCQ Questions Session 2024-2025.
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When a plastic comb is passed through dry hair, it acquires a negative charge due to the transfer of electrons from the hair to the comb. Hair loses electrons and becomes positively charged, while the comb gains electrons and becomes negatively charged, following the principle of triboelectric charging.
Answer: (a) Always negative.
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