In the manometer, the fluid whose pressure is being measured should h...
The fluid whose pressure is being measured should have a mass density less than that of the manometric fluid, and the two fluids should not be able to mix readily – that is, they must be immiscible.
Hence the correct answer is option A.
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In the manometer, the fluid whose pressure is being measured should h...
Manometer and Fluid Density
Manometer:
A manometer is a device used to measure the pressure of a fluid in a closed container. It consists of a U-shaped tube filled with a liquid, usually mercury or water. One end of the tube is open to the atmosphere, and the other end is connected to the container whose pressure is being measured.
Fluid Density:
The density of a fluid is defined as its mass per unit volume. It is an important property of the fluid and affects its behavior in various ways. In the context of manometers, the density of the fluid whose pressure is being measured is crucial.
Relation between Fluid Density and Manometer:
In a manometer, the fluid whose pressure is being measured should have a density less than the density of the manometer fluid. This is because the manometer works on the principle of balancing the pressure between two fluids of different densities.
When the pressure in the container is greater than the atmospheric pressure, the fluid in the manometer tube moves towards the container. The height difference between the two sides of the tube is directly proportional to the pressure difference between the container and the atmosphere.
If the fluid whose pressure is being measured has a density greater than the manometer fluid, the height difference between the two sides of the tube will be very small, and it will be difficult to measure the pressure accurately. On the other hand, if the density of the fluid is less than the manometer fluid, the height difference between the two sides of the tube will be large, and the pressure can be measured accurately.
Therefore, the fluid whose pressure is being measured should have a density less than the manometer fluid to ensure accurate measurement of pressure.
Conclusion:
In a manometer, the fluid whose pressure is being measured should have a density less than the density of the manometer fluid. This is important to ensure accurate measurement of pressure.