A) cooled
B) heated
C) maintains its temperature
D) heated or cooled depending on the atmospheric pressure
Correct Answer: B
Solution :
When the electric fan is switched on, the electric energy is converted into mechanical energy, which in turn is converted into heat energy. It is so because the rotating fan in a closed room will increase the kinetic energy of translation of molecules of air in the room and hence, temperature of the room increases.
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