A manometer reads the pressure of a gas in an | vedclass

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(C) Atmospheric pressure,$P_{0} = 76\,cm$ of $Hg$.The difference between the levels of mercury in the two limbs of the manometer gives the gauge press

Vedclass · Accepted Answer

$96,\,20$

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(C) Atmospheric pressure,$P_{0} = 76\,cm$ of $Hg$.The difference between the levels of mercury in the two limbs of the manometer gives the gauge pressure.From the figure,the gauge pressure is $P_{g} = 20\,cm$ of $Hg$.Absolute pressure is the sum of atmospheric pressure and gauge pressure.$P_{abs} = P_{0} + P_{g} = 76\,cm + 20\,cm = 96\,cm$ of $Hg$.Thus,the absolute pressure is $96\,cm$ of $Hg$ and the gauge pressure is $20\,cm$ of $Hg$.

$A$ manometer reads the pressure of a gas in an enclosure as shown in the figure. The absolute and gauge pressure of the gas in $cm$ of mercury are (Take atmospheric pressure $= 76\,cm$ of mercury)

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