Two thermometers are used to record the temperature of a room and the bulb of one is wrapped in a wet hanky.

The temperature recorded by both will be same

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The temperature recorded by the wet-bulb thermometer will be greater than that recorded by the other

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The temperature recorded by dry-bulb thermometer will be greater than that recorded by the other

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None of the above

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Solution

The correct option is B The temperature recorded by dry-bulb thermometer will be greater than that recorded by the other
The temperature recorded by the dry bulb thermometer will be greater. Due to evaporation cooling is caused which lowers the temperature of the bulb wrapped in a wet hanky.

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