Advertisements
Advertisements
प्रश्न
What is an aneroid barometer?
Draw a neat and labeled diagram to explain its construction and working.
Advertisements
उत्तर
Aneroid barometer is a portable type of barometer.
In this, no liquid is used. It consists of a metal box corrugated to make it flexible. The lower side of the box is fixed to the base of the instrument and the upper side is supported by a stout spring S. The box is partially evacuated. So it tends to collapse under the pressure of air. The stout spring balances the thrust on the metal box due to normal air pressure and prevents the box from collapsing.
When atmospheric pressure changes, the surface supported by the spring S moves in if pressure increases or out if the pressure decreases slightly. This small movement is increased considerably by a system of levers one end of which is connected to the spring S. The other end of the lever system is connected to a chain which is wrapped round a spindle carrying a pointer. The pointer moves over a scale which is graduated to read the pressure in centimeters or inches.
APPEARS IN
संबंधित प्रश्न
Give reason for the following:
Water does not run out of a dropper unless its rubber bulb is pressed.
Why is the barometric height used as unit to express the atmospheric pressure?
Why does a fountain pen leak at high altitude?
Why does nose start bleeding on high mountains?
Give reasons for the following:
The Westerlies in the Southern Hemisphere blow with greater force than those in the Northern Hemisphere.
How does the atmospheric pressure change with altitude?
The atmosphere is a layer of gases surrounding the planet.
Clouds float in atmosphere because of their low ______.
Figure shows a child blowing air with a straw near the opening of another straw which has its other end in a soft drink bottle. It was observed that the level of the soft drink in the straw rises up as soon as air is blown over its open end. Which one of the following best explains the reason for rise in level of the drink?
