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Question
Most commonly known barometric fluid is
Most commonly known barometric fluid is
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Solution
The correct option is A Mercury
The first reason to use mercury is its high density. The atmospheric pressure measured by mercury barometer is the pressure equal to that at the bottom of the mercury column given by hρg.Due to high value of ρ the same pressure can be measured for smaller value of h.Also the vapor pressure of mercury is negligible, due to which the barometric height is not affected.
The first reason to use mercury is its high density. The atmospheric pressure measured by mercury barometer is the pressure equal to that at the bottom of the mercury column given by hρg.
Due to high value of ρ the same pressure can be measured for smaller value of h.
Also the vapor pressure of mercury is negligible, due to which the barometric height is not affected.
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