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O-LevelPhysicsForces5054/11 · Oct/Nov 2020 · Q131 Mark

A mercury manometer is used to measure the pressure of a gas. The pressure of the atmosphere is po and the density of mercury is ρ. What is the pressure of the gas?

Diagram for this question, from the exam paper

This question uses a diagram from the original paper, which isn't shown here. Open the full paper from the past papers archive to see it.

Apo – hρg

Bpo + hρg

Cpo

Dhρg

✓ Correct answer

A: po – hρg

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About this question

Topic: Forces, O-Level Physics (syllabus 5054). Multiple choice, 1 mark.
Source: O-Level Physics, Oct/Nov 2020 Paper 1 Variant 1, question 13.

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