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JEE PHYSICS MCQ: THERMAL PROPERTIES OF MATTER

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Understanding +4 | -1
Assertion: If an electric fan be switched ON in a closed room, the air of the room will be cooled.
Reason: Fan air decreases the temperature of the room.
View answer and explanation
Correct option: D
If both assertion and reason are false
The correct answer is D (If both assertion and reason are false) because an electric fan in a closed room will slightly heat the air, not cool it, and the fan does not decrease the room's temperature.

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