Bernoulli’s Principle NEET Questions

Physics - Properties of Solids and Liquids

Bernoulli’s Principle MCQ Questions


13.
The lost kinetic energy in a real (viscous) fluid flow is converted into:
A.
Sound energy
B.
Electrical energy
C.
Light energy
D.
Heat energy
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ANSWER :
D. Heat energy
14.
Bernoulli's equation P + ½ρv² + ρgh = constant is valid:
A.
For all points in a fluid
B.
Only along the same streamline in steady, non-viscous, incompressible flow
C.
Only at the surface of the fluid
D.
Between any two arbitrary points in a fluid
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ANSWER :
B. Only along the same streamline in steady, non-viscous, incompressible flow
15.
The equation of continuity for incompressible fluid flow states:
A.
P/v = constant
B.
ρ × v = constant
C.
A × v = constant
D.
P × A = constant
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ANSWER :
C. A × v = constant
16.
At a narrow constriction in a pipe, the velocity of fluid increases. This causes the pressure at the constriction to:
A.
Decrease
B.
First increase then decrease
C.
Remain the same
D.
Increase
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ANSWER :
A. Decrease
17.
In a pipe of varying cross-section (wider region area A₁, narrower region area A₂, where A₁ > A₂), the relationship between velocities v₁ and v₂ is:
A.
v₁ × v₂ = A₁ × A₂
B.
v₁ > v₂
C.
v₁ < v₂
D.
v₁ = v₂
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ANSWER :
C. v₁ < v₂
18.
Water flows through a horizontal pipe that narrows from cross-section 8 cm² to 2 cm². If the velocity in the wider section is 3 m/s, the velocity in the narrower section is:
A.
6 m/s
B.
3 m/s
C.
0.75 m/s
D.
12 m/s
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ANSWER :
D. 12 m/s