Question

The wet bulb of a thermometer shows ____ temperature if the air is dry.
A) Higher
B) Equal to other temperature
C) Lower
D) None of these

Answer 1

Hint: When the air is moist then the wet-bulb temperature increases. So, if the air is dry it will be the opposite. Humidity and the temperature shown by the wet bulb are inversely proportional. It works on the principle of evaporation.

Complete answer:
-A wet-bulb thermometer is just a normal mercury thermometer whose bulb is covered with wet texture, typically muslin, that is plunged in a supply to keep it wet.

-The wet-bulb temperature is influenced by the dissipation of water from the texture encasing the bulb.
-The loss of water from the muslin cloth by the process of evaporation shows the variation in temperature. It is influenced by the relative humidity of the atmosphere.

Let us look at the options and examine the answer.
Option A. If the air is extremely moist, the wet-bulb temperature shows a higher temperature. Thus, it is an incorrect option.

Option B. If the general humidity is 100%, which implies the air can't hold any more dampness, the wet bulb, and dry bulb temperatures are the equivalents. Thus, it is an incorrect option.

Option C. The drier the air is, the lower is the temperature recorded by the wet-bulb thermometer and the more prominent the distinction between the wet bulb and dry bulb temperatures. Thus, it is the correct option.

Additional Information:
The Wet Bulb temperature is consistently between the Dry Bulb temperature and the Dew Point. For the wet bulb, there is a powerful harmony between heat picked up because the wet bulb is cooler than the encompassing air and warmth lost due to dissipation.

Hence the correct answer is option ‘C’.

Note: The Dry Bulb temperature, typically alluded to as "air temperature", is the air property that is most regularly utilized. At the point when individuals allude to the temperature of the air, they are ordinarily alluding to the dry-bulb temperature.

Wet-bulb temperature is in a real sense named. It comes initially from a gadget called a "Sling Psychrometer", consisting of two thermometers, normally mercury or liquor types.