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प्रश्न
What is the purpose of a barometer? State two major defects of a simple barometer.
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उत्तर
Simple barometer has two main defects:
(i) It is not suitable for making an accurate measurements of atmospheric pressure as any change in the level of mercury in the tube changes the level of the free surface of mercury is a trough and fixed scale cannot be used with it.
(ii) Simple barometer is not portable. So, it cannot be used by airmen, navigators, mountaineers, who need a portable barometer.
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संबंधित प्रश्न
Explain the following :
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How is the barometric height of a simple barometer affected if A drop of liquid is inserted inside the tube?
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What effect does temperature have on air pressure?
At higher altitudes, air becomes ______
What is meant by atmospheric pressure?
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