Effect of Gravity on Fluid Pressure and Pressure Due to a Fluid Column NEET Questions

Physics - Properties of Solids and Liquids

Effect of Gravity on Fluid Pressure and Pressure Due to a Fluid Column MCQ Questions


1.
The pressure P at a depth h below the free surface of a liquid of density ρ open to the atmosphere (atmospheric pressure Pa) is given by:
A.
P = Pa − ρgh
B.
P = Pa / (ρgh)
C.
P = ρgh
D.
P = Pa + ρgh
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ANSWER :
D. P = Pa + ρgh
2.
The quantity (P − Pa) = ρgh represents:
A.
Buoyant force per unit area
B.
Gauge pressure at depth h
C.
Atmospheric pressure at depth h
D.
Absolute pressure at depth h
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ANSWER :
B. Gauge pressure at depth h
3.
Which of the following quantities does NOT appear in the expression for pressure variation with depth in a static liquid (P = Pa + ρgh)?
A.
Height of liquid column (h)
B.
Density of the liquid (ρ)
C.
Acceleration due to gravity (g)
D.
Cross-sectional area of the container (A)
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ANSWER :
D. Cross-sectional area of the container (A)
4.
The pressure difference between two points in a static liquid separated by a vertical height h is:
A.
P2 − P1 = ρg + h
B.
P2 − P1 = ρg/h
C.
P2 − P1 = mg
D.
P2 − P1 = ρgh
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ANSWER :
D. P2 − P1 = ρgh
5.
In the derivation of pressure variation with depth, which principle is used?
A.
Pascal's law only
B.
Bernoulli's theorem
C.
Conservation of energy
D.
Newton's second law (net force = 0 for a static fluid element)
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ANSWER :
D. Newton's second law (net force = 0 for a static fluid element)
6.
Pressure in a static fluid at two points at the same horizontal level is:
A.
Always equal
B.
Depends on the density of fluid
C.
Greater at the point closer to the walls
D.
Always different
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ANSWER :
A. Always equal