Question

Unit of humidity is
(a) Degree celsius
(b) Percentage
(c) Kelvin
(d) Percentage per litre

Answer 1

Hint: Humidity is the concentration of water vapour present in the air.

Complete answer:
Unit of humidity is Percentage. If there's tons of water vapour within the air, the humidity is going to be high. The higher the humidity, the wetter it feels outside. Relative humidity is the concentration of water vapor actually present in the air, expressed as a percentage of the maximum amount of water vapor the air can hold at the same temperature. Humidity can be measured by either calculating the partial pressure of vapour in the air or using a psychrometer.
A psychrometer measures the ratio within the atmosphere by using two thermometers- a dry bulb thermometer, which is employed to live the temperature by being exposed to the air and a wet bulb thermometer, which measures temperature by having the bulb dipped during a liquid. Through the comparison of both temperatures, individuals determine the relative humidity of the surrounding area by calculating the difference between the temperatures.
Further, a psychrometer chart helps to find the relative humidity once a reading has been taken.
The measure of humidity is important because the higher the humidity, the more hot it is. In industries it is important to know the humidity for the safety of the personal and determination of the cost of the product. It also indicated the quantity of fog, dew and mist in the atmosphere, which is necessary for travel purposes.

So the correct answer is, ‘ Percentage’

                                                  Image: Simple psychrometer

Note:
1. Humidity is also measured in grams per cubic meter.
2. In weather reports, humidity is always shown as percentage relative humidity.
3. A psychrometer is actually a simple hygrometer, used to measure humidity.