In short explain the construction and working of simple barometer
A barometer is a devise used to measure the air pressure. It is generally used to measure atmospheric pressure.
A mercury barometer has a glass tube with a height of at least 84 ?cm , closed at one end, with an open mercury-filled reservoir at the base. The weight of the mercury creates a vacuum in the top of the tube. Mercury in the tube adjusts until the weight of the mercury column balances the atmospheric force exerted on the reservoir.
The pressure is quoted as the level of the mercury's height in the vertical column.One atmosphere (1 atm) is equivalent to 760?millimeters of mercury column. So the height of the mercury column varies according to external pressure on the mercury in reservoir.
Hope it helps :)
A mercury barometer has a glass tube with a height of at least 84 ?cm , closed at one end, with an open mercury-filled reservoir at the base. The weight of the mercury creates a vacuum in the top of the tube. Mercury in the tube adjusts until the weight of the mercury column balances the atmospheric force exerted on the reservoir.
The pressure is quoted as the level of the mercury's height in the vertical column.One atmosphere (1 atm) is equivalent to 760?millimeters of mercury column. So the height of the mercury column varies according to external pressure on the mercury in reservoir.
Hope it helps :)
