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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
Barometer is a device used for measuring atmospheric pressure.
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.
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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