|Which of the following statement(s) regarding relative humidity is/are correct?|
|1. Coastal regions have high relative humidity as compared to desert areas.|
|2. Relative humidity of 100% indicates that dew point is equal to the current temperature.|
|3. Relative humidity of a region is always above 50%|
|Select the correct answer using the codes given below.|
A) Only 1
B) 1 and 2
C) 2 and 3
D) All of these
Correct Answer: B
Solution :[b] Humidity is a measure of the dampness of the amosphere which varies greatly from place to place at deferent times of day. The actual amount of water vapour in the air is called absolute humidity. While relative humidity is defined as the ration between the actual amount of vapour and the total amount the air can hold at a given temperature, expresses as a percentage. The dew point is the temperature below which the water vapour in air at constant pressure condenses into liquid water. A high relative humidity indicates that dew point is closer to the current air temperature. Dry air has relative humidity less than 50%.
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