ICSE Worksheet for chapter-7 Pressure in A Fluid class 9

ICSE Worksheet for chapter-7 Pressure in A Fluid class 9

Worksheet For class 9

Find ICSE Worksheet for chapter-7 Pressure in A Fluid class 9

CLASS-9

BOARD: ICSE

Physics Worksheet - 7

TOPIC: Pressure in A Fluid

For other ICSE Worksheet for class 9 Science check out main page of Physics Wallah.

SUMMARY

• Thrust and pressure, Pressure in fluids, Pressure exerted by a liquid column

• Laws of liquid pressure, Consequences of liquid pressure

• Transmission of pressure in liquids and Pascal’s law, Application of Pascal’s law

• Hydraulic machines

SECTION 1 – OBJECTIVE

1. Nose bleeding may occur at high altitude because:
   1. The value of g decreases
   2. The atmospheric pressure decreases.
   3. The oxygen content of atmosphere decreases
   4. There are strong air currents in upper atmosphere.
2. 2. At a place the correct barometric height is 75 cm of Hg. What will the corresponding height if water is used in barometer?
   1. 10.2 m
   2. 11.2 m
   3. 10.6m
   4. 15 m
3. Pressure is a _____ quantity.
   1. Scalar
   2. Vector
   3. Neither (a) nor (b)
   4. All of these
4. 4. The normal atmospheric pressure is:
   1. 76 m of Hg
   2. 76 cm of Hg
   3. 76 P
   4. 76 Nm ^-2
5. The unit torr is related to the barometric height as:
   1. 1 torr = 1cm of Hg
   2. 1 torr = 0.76 m of Hg
   3. 1 torr = 1 mm of Hg
   4. 1 torr = 1 m of Hg
6. 6. The atmospheric pressure at the Earth surface is P ₁ and inside mine is P ₂ . They are related as:
   1. P ₁ = P ₂
   2. P ₁ > P ₂
   3. P ₁ < P ₂
   4. P ₂ = 0
7. 7. If the barometer is taken into a mine, the barometric height _____:
   1. Decreases
   2. Increases
   3. Remains same
   4. Unpredictable
8. 8. The device which directly indicates the altitude in meters instead of the atmospheric pressure is:
   1. Speedometer
   2. Altimeter
   3. Manometer
   4. Mercury barometer
9. 9. The pressure at a certain depth in river water is P ₁ and at the same depth in sea water is P ₂ . Then:
   1. P ₁ > P ₂
   2. P ₁ = P ₂
   3. P ₁ < P ₂
   4. P ₁ – P ₂ = atmospheric pressure
10. 10. Write the numerical value of the atmospheric pressure on the surface of the Earth in Pascal.
    1. 1.013x10 ⁵ Pascal
    2. 1.013x10 ^-5 Pascal
    3. 1.013x10 ^-7 Pascal
    4. 1.011x10 ⁷ Pa

SECTION II - SUBJECTIVE

1. Define:
   1. Thrust
   2. Pressure
   3. Fluid
2. 2. Distinguish between the following:
   1. Mercury barometer and Aneroid barometer
   2. Manometer and Barometer.
3. 3. State the disadvantages of using water in a barometer.
4. 4. Explain the working of a hydraulic brake with its simple labeled diagram.
5. 5. A hammer exerts a force of 1.5 N on each of the two nails A and B. The area of cross-section of tip of nail A is 2 mm ² while that the nail B is 6 mm ² . Calculate pressure on each nail in Pascal.
6. 6. The pressure of water on the ground floor is 40,000 Pa and on first floor is 10,000 Pa. Find the height of the first floor (Take density of water = 1000kg/m ³ , g = 10 m/s ² )
7. 7. In a hydraulic machine, a force of 2N is applied on the piston of area of cross-section 10 cm ² . What force is obtained on its piston of area of cross-section 100 cm ² ?

Solutions: to worksheet-7 Topic- Pressure in A Fluid class 9

Objective Problems

Subjective Problems

5. 7.5 x 10 ⁵ Pa, 2.5 x 10 ⁵ Pa

6. H = 3m

7. F ₂ = 20N