Question

Why can a comb's attraction for paper be weak or absent on a rainy day or when the hair is wet?

विकल्प

• 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.

Answer 1

Moisture makes the surface slightly conductive, allowing charge to leak away quickly. The comb then does not retain enough charge to attract paper strongly.