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Physics-Pressure in Fluids

NEET Physics Pressure in Fluids MCQ Question

Type: MCQ-diagram based-Hard-Class 11

Consider a U-tube manometer filled with mercury and open to the atmosphere on both ends. If one side of the U-tube is connected to a gas cylinder and the mercury column on that side rises by 20 cm compared to the other side, which of the following shows the correct pressure difference between the gas cylinder and the atmosphere?

Question diagram
A

2660 Pa

B

1330 Pa

C

26600 Pa

D

133 Pa

Correct Answer

Option C

Detailed Explanation

Since the mercury column rises by 20 cm, the pressure difference is calculated using 1 cm of Hg = 1330 Pa. Thus, 20 cm of Hg = 20 x 1330 Pa = 26600 Pa.

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