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Solved Short Questions of Fluid Dynamics

This page consists of solved conceptual questions included in the Physics Course of First Year for all BISE Khyber Pakhtunkhwa, KPK.

PHYSICS

Class 11
Short Questions

Chapter 6

Question 1 Smoke rises in a chimney faster when a breeze is blowing. Use Bernoulli’s principle to explain this phenomena.

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Question 2 Why do many trailer trucks use wind deflector on the top of their cabs? How do such devices reduce fuel consumption?

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Question 3 Consider the cross-section of the wing on an aeroplane. The wing is designed such that the air travels faster over the top than under the bottom. Explain why there is a net upward (lift) force on the wing due to the Bernoulli effect.

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Question 4 When a fast moving train passes a man standing on the platform at rest. He is likely to be drawn towards train. How does Bernoulli’s effect explain this phenomena?

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Question 5 If you suddenly turn on your shower water at full speed, why is the shower curtains pushed downward?

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Question 6 A baseball moves past a observer from left to right spinning counter-clockwise. In which direction will the ball tend to deflect?

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Question 7 A spherical body is dropped in two different fluids and its terminal velocity is found to be different. Give reason.

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Question 8 A liquid passed through a pipe and it was found that the rate of influx was equal to the rate of efflux. What information do you get about the liquid?

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Question 9 An incompressible liquid is passed through a horizontal pipe and it is observed that the speed of mass of liquid when emerges is greater than its speed when it enters the pipe. How can it be possible?

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Question 10 Why does the pipe of paper squeeze when air is blown through it?

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Question 11 When water from a tap, its cross-sectional area decreases as it comes down. Explain why?

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Question 12 Why a car has oblong shape design?

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Question 13 How do the pulsations in pulse show the hear beat?

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Question 14 Describe the working of an engine carburetor and pain spray.

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