A student uses a vertical glass tube to measure the pressure of a gas supply connected to a liquid manometer. The height difference of the liquid columns is hhh.
The measurement is repeated using a manometer tube with a larger cross-sectional area.
Explain why the height difference h h\,h does not change.
54 exam-style questions on Edexcel GCSE Physics 15.2 Pressure in fluids, covering 15.2.1 Atmospheric pressure and height, 15.2.2 Pressure in fluids, 15.2.3 Pressure, force and area, 15.2.4 Pressure and depth, 15.2.5 Pressure in liquids: depth and density, 15.2.6 Upthrust, and 15.2.7 Floating and sinking. Each one has a worked solution and a mark scheme showing where the marks go.