Advertisements
Advertisements
प्रश्न
What is an altimeter? State its principle. How is its scale calibrated?
Advertisements
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.
संबंधित प्रश्न
When we press the bulb of a dropper with its nozzle kept in water, air in the dropper is seen to escape in the form of bubbles. Once we release the pressure on the bulb, water gets filled in the dropper. The rise of water in the dropper is due to
The atmospheric pressure on earth surface is nearly .............. .
The atmospheric pressure at sea level is nearly
Describe a simple experiment to illustrate that air exerts pressure.
A partially inflated balloon is placed inside a bell jar connected to a vacuum pump. On creating vacuum inside the bell jar, balloon gets more inflated. How does the pressure change: increase, decrease or remains same, inside the (a) bell jar, (b) balloon?
Illustrate with the help of a labelled diagram of a simple barometer that the atmospheric pressure at a place is 76 cm of Hg.
Draw a simple diagram of a Fortin's barometer and state how it is used to measure the atmospheric pressure.
What is an aneroid barometer?
Draw a neat and labeled diagram to explain its construction and working.
As we go from the equator of the earth to pole of the earth, the value of acceleration due to gravity ______.
The standard air pressure at sea level is ______.
