# Punjab 11th Class Physics Chapter 6 Fluid Dynamics Mcqs Test Online

 Total Question 12 Questions Total Marks 24 Marks Total Time 12 Minuts
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### Test Name

 Ch.6 # Fluid Dynamics

### Subject

 Physics (11th Class)

 Mcqs

# Punjab 11th Class Physics Chapter 6 Fluid Dynamics Mcqs Test Online

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Question 1 of 12

## Physics

1. Two capillary tubes A and B of equal radii ra=rb=r and equal length la=lb=l are held horizontally. When the same pressure difference P is maintained across each tube, the rate of flow of water in each is Q. If the tubes are connected series and the same pressure difference P is maintained across the combination, the rate of flow through the combination will be

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Question 2 of 12

2. The smooth or steady steam – line flow is known as”

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3. The cylinder tube of a spray pump has a radius R, one end of which has ‘n’ number of fine uniform holes, each of radius ‘r’. If the speed of flow of the fluid in the tube is v₁, the speed of ejection of the liquid through the holes id

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4. A 3m tall cylinder, full of water, has four identical small holes at height 2.1m, 2.3m and 2.4 meter. The speed of efflux is maximum from

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5. A rain drop of radius ‘r’ falls in air with a terminal speed vt. What is the terminal speed of a rain drop of radius 2r?

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Question 6 of 12

6. In a test experiment on a model airplane in a wind tunnel. The flow speeds on the lower and upper surface of the wings are ‘v’ and √2v respectively. If the density of air is ‘r’ and the surface area of the wing is given.

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Question 7 of 12

7. According to Stoke’s law, drag force depends on

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8. A rectangular tank is filled completely with water. When a hole at its bottom is unplugged, the tank is emptied in time T. If the tank is half filled with water, it will be emptied in time.

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Question 9 of 12

9. Eight spherical rain drops of same mass and radius are falling down with a terminal velocity of 6 cm s⁻¹. If they coalesce to form on big drop, what will be its terminal speed? Neglect the buoyancy due to air.

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10. With increase of temperature viscosity

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Question 11 of 12

11. Water flows steadily through a horizontal pipe of a variable cross-section. If the pressure at another point where the velocity of fluid flow is 2v₁ consider ‘p’ as density of water.

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Question 12 of 12

12. A person standing near the track of a fast moving train has tendency to fall towards it because of:

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