Class 11 Physics · Chapter 5 · Test 4
Bernoulli's Equation and Viscosity
43 MCQs This test covers Bernoulli’s equation and its uses, the Venturi relation, Torricelli’s theorem, and viscosity with Stokes’ law and terminal velocity. It also covers ideal and real fluids and superfluids.
43 questions · 35 min · 43 marks
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Sample questions
The first 5 of 43. Try each one, then tap to see the answer.
Question 1
Bernoulli's equation states that for an ideal fluid in steady flow the sum of pressure, kinetic energy per unit volume and potential energy per unit volume is:
- AZero
- BConstant
- CIncreasing
- DDecreasing
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Answer: B
The sum p + ½ρv² + ρgh remains constant along the flow.
Question 2
Bernoulli's equation is written as:
- Ap + ½ρv² + ρgh = constant
- Bp - ½ρv² + ρgh = constant
- Cp + ρv + gh = constant
- Dp + ρv² + ρgh = constant
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Answer: A
Pressure + kinetic energy per volume + potential energy per volume is constant.
Question 3
Which assumption is NOT used in deriving Bernoulli's equation?
- AFluid is incompressible
- BFluid is non-viscous
- CFlow is steady
- DFlow is turbulent
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Answer: D
The derivation assumes incompressible, non-viscous, steady flow.
Question 4
Bernoulli's equation is based on the law of conservation of:
- AMass
- BEnergy
- CCharge
- DMomentum only
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Answer: B
It follows from work-energy conservation applied to the fluid.
Question 5
In a horizontal pipe, where the fluid speed is greater the pressure is:
- AGreater
- BLower
- CUnchanged
- DInfinite
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Answer: B
Constant energy per volume means higher speed gives lower pressure.
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