Manometer
Manometer
Measuring Liquid Pressure: The Manometer: A manometer is a simple device used to measure liquid pressure. It has a U-shaped glass tube which is fixed to a wooden board having a scale. The U-tube is filled with colored water such that its limbs are half filled. One end of the U-tube is open. The other end is fixed to rubber tube which in turn is connected to a thistle funnel. This improvised apparatus is called as manometer.
Take this apparatus and cover the mouth of thistle funnel with a tight thin rubber sheath taken from a balloon. If you press the rubber sheath lightly with your fingers, the pressure on it increases. Due to this the water level in limb A will go down and in limb B will go up. You can read the difference in water levels on the scale. This is a measure of pressure exerted on the rubber sheath
Measuring Liquid Pressure In Different Directions At The Same Depth: Now keeping the funnel at the same level change the direction of mouth of funnel to sideways in fig. (b). The rise in level of water in U tube remains the same. This shows that liquid pressure does not change. This proves that at the same depth a liquid exerts equal pressure in all directions. Liquid pressure increases with depth.
Consequences of Liquid Pressure:
1. We know that the pressure exerted by water in the oceans increases with depth. Very deep down the pressure is enough to crush the human body. That is why deep-sea divers wear special suits, which can withstand such high pressures and prevent their bodies to crush.
2. When deep sea fishes are brought up to the surface of sea, their bodies flow at a very high pressure. At the surface of sea, the pressure outside suddenly decreases. Due to this difference in pressure their bodies burst open. Submarines are built of hard thick sheets of metal to withstand the high pressure under water.
Which of the following are correct : (a) Submarines are built of hard thick sheets of metal to withstand the high pressure under water. (b) Submarines are built of hard thin sheets of metal to withstand the high pressure under water. (c) Submarines are built of hard thin sheets of metal to withstand the low pressure under water. | |||
| Right Option : A | |||
| View Explanation | |||
A manometer has a ______________ glass tube which is fixed to a wooden board having a scale. | |||
| Right Option : C | |||
| View Explanation | |||
A ___________________ is a simple device used to measure liquid pressure. | |||
| Right Option : A | |||
| View Explanation | |||
Students / Parents Reviews [20]
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8thMy experience with Abhyas is very good. I have learnt many things here like vedic maths and reasoning also. Teachers here first take our doubts and then there are assignments to verify our weak points.
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Yatharthi Sharma
10thThird consective year,my ward is in Abhyas with nice experience of admin and transport support.Educational standard of the institute recumbent at satisfactory level. One thing would live to bring in notice that last year study books was distributed after half of the session was over,though study ...
Ayan Ghosh
8thAbhyas institute is one of the best coaching institute in the vicinity of Ambala Cantt area. The teachers of the institute are well experienced and very helpful in solving the problems of the students.The good thing of the institute is that it is providing extra classes for the students who are w...
Aman Kumar Shrivastava
10thAbhyas Methodology is very good. It is based on according to student and each child manages accordingly to its properly. Methodology has improved the abilities of students to shine them in future.
