Скачать или смотреть Chapter 6 mcqs physics class 11 || Fluid Dynamics || kpk board|| feel the nature|| Urdu Hindi ||

Chapter 6 mcqs physics class 11 || Fluid Dynamics || kpk board|| feel the nature|| Urdu Hindi ||

Chapters

0:00 Intro
00:19 MCQ 01
01:48 MCQ 02
04:22 MCQ 03
05:26 MCQ 04
06:25 MCQ 05
07:56 MCQ 06
09:02 MCQ 07
11:08 MCQ 08
12:35 MCQ 09
15:29 MCQ 10
18:06 MCQ 11
18:44 MCQ 12
20:44 MCQ 13
21:38 MCQ 14
23:14 MCQ 15

1. For substances that do not flow easily (like honey) have the ______ value for the coefficient of viscosity
A. low B. high C. zero D. negative

2. A unit for viscosity, the centipoise, is equal to which of the following?
A. 10-3 Ns/m2 B. 10-2 Ns/m2 C. 102 Ns/m2 D. 103 Ns/m2

3. Stokes law is applicable only if a body is moving through a liquid with slow speed and has __________ shape.
A. a cubical B. a spherical C. a rough D. any

4. The net force that acts on a 10-N falling object, when it encounters 4 N of air resistance is
A. 0 N B. 4 N C. 6 N D. 10 N

5. A skydiver jumps from a high-flying helicopter. Before reaching terminal velocity, her acceleration
A. increase B. decrease C. remain the same D. is zero

6. At terminal velocity the acceleration of a falling object is
A. 0 ms-2 B. 1 ms-2 C. - 9.8 ms-2 D. + 9.8 ms-2

7. According to equation of continuity Av = constant. This constant is equal to
A. volume of fluid B. mass of fluid C. density of fluid D. volume flow rate

8. At the constriction in the cross-section for ideal flow, from equation of continuity it follows that, the speed of fluid is
A. greater B. less C. same D. zero

9. As water in a level pipe passes from a narrow cross section of pipe to a wider cross section, the pressure against the wall
A. increases B. decreases C. remains the same D. is zero

10. A 4 m high tank filled with water is drilled with four identical small holes at 1 m, 1.5 m, 2 m and 2.5 m from the bottom of tank, the speed of efflux will be greatest from the hole at
A. 1 m B. 1.5 m C. 2 m D. 2.5 m

11. Venturi meter is a device used to measure the
A. mass of fluid B. viscosity of fluid C. speed of fluid D. density of fluid

12. A certain pipe has a cross-sectional area of 0.0001 m2 in which water is flowing at 10 m/s. The volume flow rate is
A. 0.00001 m3/s B. 0.001 m3/s C. 1 m3/s D. 10.0001 m3/s

13. At sufficiently high speeds the flow of viscous fluid becomes
A. unexpected B. stream line C. non-viscous D. turbulent

14. The water in the tank is 10 m above the leak point. The speed with which the water emerge from the leak is
A. 10 m/s B. 14 m/s C. 194 m/s D. 0.1 m/s

15. When the radius of the artery is reduced, the blood pressure
A. increased B. decreased C. remains the same D. is zero

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