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प्रश्न
Why can a comb's attraction for paper be weak or absent on a rainy day or when the hair is wet?
पर्याय
Moisture makes the comb an equipotential body with no surface.
Moisture turns the paper into a Faraday cage.
Moisture makes the surface slightly conductive, so charges leak away quickly.
Wet hair prevents any friction between hair and comb.
MCQ
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उत्तर
Moisture makes the surface slightly conductive, allowing charge to leak away quickly. The comb then does not retain enough charge to attract paper strongly.
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