Q.

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

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a

the temperature recorded by both will be same

b

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

c

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

d

none of the above

answer is C.

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Detailed Solution

the temperature recorded by wet-bulb thermometer will be less as evaporation will takes place.hence the temperature recorded by the dry bulb thermometer will be greater than that recorded by other.
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Two thermometers are used to record the temperature of a room. If the bulb of one is wrapped in wet hanky :