Fans increase the rate of air circulation around the body. During hot weather, the body sweats to cool down. Increased air movement by a fan speeds up the evaporation of sweat from the skin surface. Evaporation is an endothermic process, meaning it absorbs heat from the body, thus producing a cooling effect and a feeling of comfort.
A fan produces a feeling of comfort during the hot weather because
Asked in BPSC Prelims Exam 67th Cancelled · Topic: Heat and Thermodynamics (Modes of Heat Transfer (Conduction, Convection, Radiation))
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Answer: D. our perspiration evaporates rapidly
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