ISC Physics Class XI Part 1>Chapter 17 - Motion in Fluids : Viscosity>QUESTIONS>Q 14

MEDIUM

11th ICSE

IMPORTANT

Earn 100

Define coefficient of viscosity of a liquid. Write down its dimensional formula and its MKS unit.

Important Questions on Motion in Fluids : Viscosity

EASY

11th ICSE

IMPORTANT

ISC Physics Class XI Part 1>Chapter 17 - Motion in Fluids : Viscosity>NUMERICALS>Q 1

Velocity of flow of water in a horizontal pipe is

10 m s^{- 1}

. Find the velocity-head of water.

(g = 10 m s^{- 2})

MEDIUM

11th ICSE

IMPORTANT

ISC Physics Class XI Part 1>Chapter 17 - Motion in Fluids : Viscosity>NUMERICALS>Q 2

Water is flowing through a cylindrical pipe of cross-sectional area

0.009 π m^{2}

at a speed of

1.0 m s^{- 1}

. If the diameter of the pipe is halved, then find the speed of flow of water through it.

MEDIUM

11th ICSE

IMPORTANT

ISC Physics Class XI Part 1>Chapter 17 - Motion in Fluids : Viscosity>NUMERICALS>Q 3

Water is flowing through a horizontal tube of non-uniform cross-section. At a place the radius of the tube is

0.5 c m

and the velocity of water there is

20 c m s^{- 1}

. What will be the velocity at another place where the radius of the tube is

1.0 c m

?

MEDIUM

11th ICSE

IMPORTANT

ISC Physics Class XI Part 1>Chapter 17 - Motion in Fluids : Viscosity>NUMERICALS>Q 4

Water is flowing through a horizontal pipe of non-uniform cross-section. The speed of water is

30 c m s^{- 1}

at a place where pressure is

10 c m

(of water). Calculate the speed of water at the other place where the pressure is half of that at the first place.

MEDIUM

11th ICSE

IMPORTANT

ISC Physics Class XI Part 1>Chapter 17 - Motion in Fluids : Viscosity>NUMERICALS>Q 5

Water enters a horizontal pipe of non-uniform cross-section with a velocity of

0.5 m s^{- 1}

and leaves the other end with a velocity of

0.7 m s^{- 1}

. The pressure of water at the first end is

10^{3} N m^{- 2}

. Calculate pressure at the other end. ( Density of water

= 1.0 \times 10^{3} k g m^{- 3}

).

MEDIUM

11th ICSE

IMPORTANT

ISC Physics Class XI Part 1>Chapter 17 - Motion in Fluids : Viscosity>NUMERICALS>Q 6

Water flows through a horizontal pipe of varying cross-section. The pressure of water equals to

0.1 m

of mercury at a place where the velocity of flow is

0.4 m s^{- 1}

. What will be the pressure at another place where the velocity of flow is

0.5 m s^{- 1}

?

HARD

11th ICSE

IMPORTANT

ISC Physics Class XI Part 1>Chapter 17 - Motion in Fluids : Viscosity>NUMERICALS>Q 7

Water is flowing through a horizontal pipe of varying cross-section. At any two places, the diameters of the tube are

4 c m

and

2 c m

. If the pressure difference between these two places be equal to

4.5 c m

(water), then determine the rate of flow of water in the tube.

HARD

11th ICSE

IMPORTANT

ISC Physics Class XI Part 1>Chapter 17 - Motion in Fluids : Viscosity>NUMERICALS>Q 8

Water is flowing steadily through a horizontal pipe of non-uniform cross-section. At a point, where the cross-sectional area of the pipe is

0.02 m^{2}

, the pressure of water is

4.0 \times 10^{4}

(or

P a

) and its velocity of flow is

2.0 m s^{- 1}

. What is the pressure at a point where the cross-sectional area is

0.01 m^{2}

? The density of water is

10^{3} k g m^{- 3}

.