MCQ Non-Ideal Fluids, Class 11 Physics

1. There will be total 10 MCQ in this test.
2. Please keep a pen and paper ready for rough work but keep your books away.
3. The test will consist of only objective type multiple choice questions requiring students to mouse-click their correct choice of the options against the related question number.
4. No negative marking for incorrect choice.
5. Please click on “Finish the Test” when you want to exit.
6. All the best – Happy Studying

1. The viscosity of liquids _________ with increase in temperature.

Decreases

Increases

Depends on the type of liquid

Remains same

Your comments:

Question 1 of 10

2. The terminal velocity of a steel ball of 4 mm in diameter falling through a glycerin of viscosity 3.3 poise, given relative density of steel is 8, relative density of glycerin is 1.3 is

13.23 cm s^-1

17.47 cm s^-1

1.47 cm s^-1

1.77 cm s^-1

Your comments:

Question 2 of 10

3. As the velocity of a body increases, the viscous force on it

Remains unaltered

Might increase or decrease according to medium

Increases

Decreases

Your comments:

Question 3 of 10

4. A value of Reynold's number _________ indicates turbulence.

R > 2000

R < 2000

R < 100

R < 1000

Your comments:

Question 4 of 10

5. The viscosity of gases ________ with increase in temperature

Remain same

Depends on the type of liquid

Decrease

Increase

Your comments:

Question 5 of 10

6. Terminal velocity of a spherical body of density ρ and radius r moving through a liquid of density ρ’ is given by

A

B

C

D

Your comments:

Question 6 of 10

7. The relative velocity between two parallel layers of water is 10 cm/s and the perpendicular distance between them is 0.1 cm. The velocity gradient is

100 cm s^-1/cm

0.1 m s^-1/m

10 m s^-1/m

1 cm s^-1/cm

Your comments:

Question 7 of 10

8. Force of viscosity acting on a spherical body of radius r moving with velocity v through a fluid of viscosity η is given by

F = 6 η v/r

F = 6 π η r v

F = 6 π η v

F = 6 η r v

Your comments:

Question 8 of 10

9. The quantity which decides the nature of flow of a viscous liquid through a pipe is known as

Surface Tension

Viscosity

Dynamic lift

Reynold's Number

Your comments:

Question 9 of 10

10. Range of Reynold's number for the laminar flow of a liquid is

2000 to 3000

Zero to 1000

1000 to 2000

Zero to 2000

Your comments:

Question 10 of 10

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