CameraIcon

SearchIcon

MyQuestionIcon

1

You visited us 1 times! Enjoying our articles? Unlock Full Access!

Atmospheric Pressure

A manometer r...

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 Mercury (Take atmospheric pressure = 76 cm of mercury)

A

76, 20

No worries! We‘ve got your back. Try BYJU‘S free classes today!

B

20, 76

No worries! We‘ve got your back. Try BYJU‘S free classes today!

C

96, 20

Right on! Give the BNAT exam to get a 100% scholarship for BYJUS courses

D

20,96

No worries! We‘ve got your back. Try BYJU‘S free classes today!

Open in App

Solution

The correct option is D 96, 20
Here, atmospheric pressure $P = 76$ cm of mercury In figure, Pressure head, $h = 20$ cm of mercury
Absolute pressure $= P + h = 76 + 20 = 96 c m$ of mercury
Gauge pressure $= h = 20 c m$ of mercury.

Suggest Corrections

thumbs-up

1

Similar questions

Q. A manometer reads the pressure of a gas in an enclosure as shown in Fig (a). When a pump removes some of the gas, the manometer reads as in Fig (b). The liquid used in the manometers is mercury and the atmospheric pressure is

76

c m

of mercury.
(a) Give the absolute and gauge pressure of the gas in the enclosure for cases (a) and (b), in units of

c m

of mercury.
(b) How would the levels change in case (b) if

13.6

c m

of water (immiscible with mercury) are poured into the right limb of the manometer? (Ignore the small change in the volume of the gas).

Q. Give the absolute and gauge pressure of the gas in the enclosure for cases (a) and (b)in units of cm of mercury.

Q. The heights of mercury surfaces in the two arms of the manometer shown in figure are 2 cm and 8 cm.
Atmospheric pressure = 1.01 × 10⁵ N⁻². Find (a) the pressure of the gas in the cylinder and (b) the pressure of mercury at the bottom of the U tube.

Q. When the left arm of a mercury manometer is connected to a cylinder filled with a gas, the level of the mercury in the right arm rises by 2 cm. If the pressure of the gas in the container 110160 Pa, the atmospheric pressure is __________cm of Hg. ( take

g = 10 m s^{- 2}

)

Q. The heights of mercury surface in the two arms of the manometer shown in figure are

h_{2}

h_{1}

(h_{1} > h_{2})

and atmospheric pressure is equal to

P_{a}

. Pressure of the gas in the cylinder is equal to,

View More

Join BYJU'S Learning Program

similar_icon

Related Videos

lock

Pascal's Law

PHYSICS

Watch in App

explore_more_icon

Explore more

Atmospheric Pressure

Standard XII Physics

Join BYJU'S Learning Program

CrossIcon