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For manometer, a better liquid combination is one having
- a)higher surface tension
- b)lower surface tension
- c)surface tension is no criterion
- d)high density and viscosity
- e)low density and viscosity.
Correct answer is option 'A'. Can you explain this answer?
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For manometer, a better liquid combination is one havinga)higher surfa...
manometer liquid has high surface tension then the liquid surface in a tube will be in a shape of the dome it wouldn't be flat so we can't measure a correct reading that's why liquid should have low surface tension.
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For manometer, a better liquid combination is one havinga)higher surfa...
Introduction:
A manometer is a device used to measure the pressure difference between two points in a fluid. It consists of a U-shaped tube filled with a liquid, and the pressure difference is determined by the difference in liquid levels in the two arms of the tube. The choice of liquid used in a manometer is important and can affect the accuracy and reliability of the measurements.
Explanation:
The better liquid combination for a manometer is one that has a lower surface tension. Here's why:
1. Definition of Surface Tension:
Surface tension is the force acting per unit length along the surface of a liquid due to the cohesive forces between its molecules. It is responsible for the liquid's tendency to minimize its surface area.
2. Importance of Surface Tension in a Manometer:
In a manometer, the liquid in the tube needs to form a meniscus, which is the curved surface at the liquid-air interface. The height difference between the two liquid levels in the arms of the U-tube is directly related to the pressure difference being measured. The meniscus shape is influenced by surface tension, and a larger surface tension can lead to inaccuracies in the measurements.
3. Effect of Surface Tension on Meniscus Shape:
Surface tension tends to pull the liquid molecules inward, causing the meniscus to curve downwards in a concave shape. The curvature of the meniscus affects the accuracy of the pressure measurement. If the surface tension is too high, the meniscus can become highly curved, making it difficult to accurately determine the liquid levels.
4. Advantages of Lower Surface Tension:
a) Improved Accuracy: Liquids with lower surface tension tend to form flatter menisci, resulting in more accurate measurements. The flat meniscus provides a clearer and more easily measurable liquid level.
b) Reduced Parallax Error: Parallax error occurs when the observer's eye is not directly in line with the liquid level. A flatter meniscus minimizes the parallax error, leading to more precise readings.
c) Greater Sensitivity: A lower surface tension allows for a more sensitive response to changes in pressure, making it easier to detect small pressure variations.
Conclusion:
In conclusion, a manometer with a liquid combination having lower surface tension is preferred because it leads to improved accuracy, reduced parallax error, and greater sensitivity in pressure measurements. Choosing a liquid with lower surface tension ensures more reliable and precise readings, making it the better choice for a manometer.
A manometer is a device used to measure the pressure difference between two points in a fluid. It consists of a U-shaped tube filled with a liquid, and the pressure difference is determined by the difference in liquid levels in the two arms of the tube. The choice of liquid used in a manometer is important and can affect the accuracy and reliability of the measurements.
Explanation:
The better liquid combination for a manometer is one that has a lower surface tension. Here's why:
1. Definition of Surface Tension:
Surface tension is the force acting per unit length along the surface of a liquid due to the cohesive forces between its molecules. It is responsible for the liquid's tendency to minimize its surface area.
2. Importance of Surface Tension in a Manometer:
In a manometer, the liquid in the tube needs to form a meniscus, which is the curved surface at the liquid-air interface. The height difference between the two liquid levels in the arms of the U-tube is directly related to the pressure difference being measured. The meniscus shape is influenced by surface tension, and a larger surface tension can lead to inaccuracies in the measurements.
3. Effect of Surface Tension on Meniscus Shape:
Surface tension tends to pull the liquid molecules inward, causing the meniscus to curve downwards in a concave shape. The curvature of the meniscus affects the accuracy of the pressure measurement. If the surface tension is too high, the meniscus can become highly curved, making it difficult to accurately determine the liquid levels.
4. Advantages of Lower Surface Tension:
a) Improved Accuracy: Liquids with lower surface tension tend to form flatter menisci, resulting in more accurate measurements. The flat meniscus provides a clearer and more easily measurable liquid level.
b) Reduced Parallax Error: Parallax error occurs when the observer's eye is not directly in line with the liquid level. A flatter meniscus minimizes the parallax error, leading to more precise readings.
c) Greater Sensitivity: A lower surface tension allows for a more sensitive response to changes in pressure, making it easier to detect small pressure variations.
Conclusion:
In conclusion, a manometer with a liquid combination having lower surface tension is preferred because it leads to improved accuracy, reduced parallax error, and greater sensitivity in pressure measurements. Choosing a liquid with lower surface tension ensures more reliable and precise readings, making it the better choice for a manometer.
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For manometer, a better liquid combination is one havinga)higher surfa...
For amplifying the deflection in a liquid column manometer, liquids with greater density could be used or one of the limbs of the manometer may be inclined. Commonly used manometric liquids are mercury, water, or alcohol. Some of the important and desirable properties of the manometric liquids are:
- High chemical stability
- Low viscosity
- Low capillary constant
- Low coefficient of thermal expansion
- Low volatility
- Low vapor pressure
- Low surface tension
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For manometer, a better liquid combination is one havinga)higher surface tensionb)lower surface tensionc)surface tension is no criteriond)high density and viscositye)low density and viscosity.Correct answer is option 'A'. Can you explain this answer?
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