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Heating Effect of Current

An electric f...

Question

An electric fan is switched on in a closed room. The air in the room is

A

cooled

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B

heated

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C

maintains its temperature

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D

heated or cooled depending on the atmosphere

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Solution

The correct option is B heated
If an electric fan is switched on in a closed room, the air will be heated because due to motion of the fan, the speed of air molecules will increase. In fact, we feel cold due to evaporation of our sweat

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