Question

how does the rate of evaporation vary when humidity increase in the air​

Answer 1

When temperature and wind speed are constant, but humidity increases, the rate of evaporation will decrease. When wind speed and humidity stay constant, and temperature increases, then the rate of evaporation will increase because warmer air can hold more water vapor than colder air.

Answer 2

Becoz there is already more than enough water vapour in the air hence more water vapour can not accumulate in the air hence the rate of. Evaporation decreases