JAMB - Physics (2000 - No. 15)

Dry
Day 1 - 30°C | Day 2 - 29°C | Day 3 - 25°C

Wet
Day 1 - 22°C | Day 2 - 22°C | Day 3 - 21°C

The reading above are for three consecutive days from a wet and dry bulb hygrometer. It can be concluded that the relative humidity for the three days
decreased steadily
remained unchanged
increased steadily
was least on Day 1

Explanation

  1 2 3
Dry 30°C 29°C 25°C
Wet 22°C 22°C

21°C 

Diff

8°C 7°C 4°C

\(Relative Humidity \propto \frac{1}{temp}\)

Hence, There is a steady increase in the relative humidity between Day 1 and Day 3

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