JAMB Physics 2008 Objective — Question 24

Question 24 of 50 from the Joint Admissions and Matriculation Board (JAMB) Physics 2008 Objective paper, with the correct answer and a full explanation.

24. If the partial pressure of water vapour at 27°C is 18mm Hg and the saturated vapour pressure of the atmosphere at the same temperature is 24mm Hg, the relative humidity at this temperature is

A. 25%
B. 33%
C. 75%Correct
D. 82%

Explanation

Relative humidity = partial pressure/saturated vapour pressure x 100 = 18/24 x 100 = 75%.

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