Q. 7

An ordinary electric fan does not cool the air, still it gives comfort in summer. Explain.

Answer :

An electric fan does not cool the air. It just creates a forced circulation of the air present inside the room. This circulation will facilitate the evaporation of sweat, that is present on the surface of one’s skin. The heat for the evaporation is taken from the skin itself, and this will cause a sense of cooling.

Hence, on a summer day, even though the air is not getting cooled by the fan, the evaporation of the sweat will create comfort for the body.

Rate this question :

How useful is this solution?
We strive to provide quality solutions. Please rate us to serve you better.
Related Videos
Work done in Thermodynamic ProcessFREE Class
Try our Mini CourseMaster Important Topics in 7 DaysLearn from IITians, NITians, Doctors & Academic Experts
Dedicated counsellor for each student
24X7 Doubt Resolution
Daily Report Card
Detailed Performance Evaluation
view all courses