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Forces and Pressure

8th Standard Science - Forces and Pressure One Mark Question Paper

Forces and Pressure One Mark Questions

8th Standard

    Reg.No. :
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Science

Time : 00:45:00 Hrs
Total Marks : 20
    5 x 1 = 5

  1. Which of the following liquids has more viscosity?

    (a)

    Grease

    (b)

    Water

    (c)

    Coconut oil

    (d)

    Ghee

  2. The unit of viscosity is

    (a)

    Nm2

    (b)

    poise

    (c)

    kgms–1

    (d)

    no unit

  3. Even if we tilt the barometric tube at various angles, the level of mercury will______

    (a)

    Not vary

    (b)

    increases

    (c)

    decreases

    (d)

    charge

  4. Rain drops are spherical in nature because of _________

    (a)

    Frictional force

    (b)

    Buoyant force

    (c)

    Surface tension

    (d)

    Viscous force

  5. The unit for surface tension is _________

    (a)

    Nm

    (b)

    N-1m

    (c)

    N-1m-1

    (d)

    Nm-1

    6. 5 x 1 = 5

  6. The property of _____ of a liquid surface enables the water droplets to move upward in plants.

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    surface tension

  7. A simple barometer was first constructed by _____.

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    Torricelli

  8. Liquids and gases together are called as___________

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    Fluids

  9. Force is a _____ quantity

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    Vector

  10. _________decides whether an object will sink or float

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    Upward force

    11. 5 x 1 = 5

  11. Force acting on a given area is called pressure.

    (a) True
    (b) False

  12. A moving body comes to rest due to friction alone.

    (a) True
    (b) False

  13. Viscosity depends on the pressure of a liquid.

    (a) True
    (b) False

  14. Frictional force acts always along direction of the moving body

    (a) True
    (b) False

  15. Friction is called as necessary evil

    (a) True
    (b) False
    16. 5 x 1 = 5

  16. Static friction

    17. (1)

    objects are in motion

  17. Kinetic friction

    18. (2)

    Nm-2

  18. Rolling friction

    19. (3)

    objects are at rest

  19. Force

    20. (4)

    Kg ms-2

  20. Pressure

    21. (5)

    Least friction

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