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प्रश्न
What is an altimeter? State its principle. How is its scale calibrated?
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उत्तर
An altimeter is a device used in aircraft to measure its altitude.
Principle: Atmospheric pressure decreases with the increase in height above the sea level; therefore, a barometer measuring the atmospheric pressure can be used to determine the altitude of a place above the sea level.
The scale of altimeter is graduated with height increasing towards left because the atmospheric pressure decreases with increase of height above the sea level.
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संबंधित प्रश्न
Explain how is the height of mercury column in tube of a simple barometer, a measure of the atmospheric pressure.
How is the barometric height of a simple barometer affected if Its tube is pushed down into the trough of mercury?
At sea level, the atmospheric pressure is 1.04 x 105 Pa. Assuming g = 10 m s-2 and density of air to be uniform and equal to 1.3 kg m-3, find the height of the atmosphere.
Why are the months of January and July used to describe the world distribution of pressure?
How does the atmospheric pressure change with altitude?
What is the purpose of a barometer? State two major defects of a simple barometer.
How is the reading of a barometer affected when it is taken to: A hill
What effect does temperature have on air pressure?
Briefly explain the concept of variation of atmospheric pressure.
