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 is (Take atmospheric pressure = 76 cm of mercury)

Question

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 is (Take atmospheric pressure = 76 cm of mercury) <img class="img-fluid question-image" alt="image" src="https://cdn.tardigrade.in/img/question/physics/e36661b8818e5016bb28fe0e87798fbe-.png" /> (A) 76, 20 (B) 20, 76 (C) 96, 20 (D) 20, 96

Tardigrade Admin · Accepted Answer

Here, atmospheric pressure P =76 cm of mercury. In figure, Pressure head, h = 20 cm of mercury Absolute pressure = P + h = 76 + 20 = 96 cm of mercury Gauge pressure = h = 20 cm of mercury

Q. 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 is (Take atmospheric pressure $= 76 c m$ of mercury)

$76, 20$

$20, 76$

$96, 20$

$20, 96$

Here, atmospheric pressure $P = 76 c m$ of mercury. In figure,
Pressure head, $h = 20 c m$ of mercury
Absolute pressure $= P + h = 76 + 20 = 96 c m$ of mercury
Gauge pressure $= h = 20 c m$ of mercury

Q. 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 is (Take atmospheric pressure =76cm of mercury)

76,20

20,76

96,20

20,96