Distance moved by liquid in different types of manometers

Introduction
In manometers, the distance moved by the liquid is a measure of the pressure difference between the two points being measured. Different types of manometers are used in various applications, and the design of the manometer affects the distance moved by the liquid.

Inclined Single Column Manometer
- In an inclined single column manometer, a U-shaped tube is inclined at an angle to the horizontal. One end of the tube is connected to the pressure source, and the other end is open to the atmosphere.
- When pressure is applied, the liquid in the tube moves up or down according to the pressure difference between the two points. The distance moved by the liquid is directly proportional to the pressure difference.
- In an inclined manometer, the vertical component of the liquid's movement is greater than the horizontal component. This is because the inclination of the tube creates a vertical component of force due to gravity.
- As a result, the distance moved by the liquid in an inclined single column manometer is greater compared to other types of manometers.

Vertical Single Column Manometer
- In a vertical single column manometer, the U-shaped tube is vertical, with one end connected to the pressure source and the other end open to the atmosphere.
- When pressure is applied, the liquid in the tube moves up or down based on the pressure difference. The distance moved by the liquid is directly proportional to the pressure difference.
- In a vertical manometer, there is no inclination to create a vertical component of force due to gravity. Therefore, the distance moved by the liquid is less compared to an inclined single column manometer.

Horizontal Single Column Manometer
- In a horizontal single column manometer, the U-shaped tube is positioned horizontally, with one end connected to the pressure source and the other end open to the atmosphere.
- When pressure is applied, the liquid in the tube moves left or right based on the pressure difference. The distance moved by the liquid is directly proportional to the pressure difference.
- Since there is no inclination or vertical component of force due to gravity in a horizontal manometer, the distance moved by the liquid is also less compared to an inclined single column manometer.

Conclusion
The distance moved by the liquid in a manometer depends on its design. In an inclined single column manometer, the liquid travels a greater distance compared to a vertical or horizontal single column manometer. Therefore, the correct answer is option 'A' - Inclined Single Column Manometer.