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JAMB Physics 2018 Paper

Question : 19

Total: 87

In the diagram given if the atmospheric pressure is 760mm, the pressure in the chamber G Is

Solution:

Concept:

For a mercury manometer, pressure in the chamber is atmospheric pressure plus or minus the mercury height difference.

Explanation:

From the diagram, the open mercury column is 70 mm higher than the mercury column connected to chamber G.

So,

P_G = P_{\text{atm}} + h = 760\ \text{mm} + 70\ \text{mm} = 830\ \text{mm}.

Answer:

B. 830mm

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