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प्रश्न
Mention two demerits of a simple barometer and state how they are removed in a Fortin barometer .
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उत्तर
In a simple barometer, there is no protection for the glass tube but in Fortin's barometer, this defect has been removed by enclosing the glass tube in a brass case.
In a simple barometer, a scale cannot be fixed with the tube (or it cannot be marked on the tube) to measure the atmospheric pressure but Fortin's barometer is provided with a vernier calipers to measure the accurate reading.
संबंधित प्रश्न
Draw a simple labelled diagram of a Fortin barometer and state how it is used to measure the atmospheric pressure.
What is an altimeter? State its principle. How is its scale calibrated?
What do the following indicate in a barometer regarding weather : Gradual rise in the mercury level?
The normal atmospheric pressure is :
State two advantages of an aneroid barometer.
How does the atmospheric pressure change with altitude?
The human lung is well adapted to breathe at a pressure of ______ k Pa.
The air pressure at sea level is referred to as ______.
