Forces and Pressure English Medium Free Online Test 1 Mark Questions 2020-2021

8th Standard

    Reg.No. :
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Science

Time : 00:10:00 Hrs
Total Marks : 10

    Part A

    10 x 1 = 10
  1. If we apply a force against the direction of motion of a body, then the body will

    (a)

    stop moving

    (b)

    move with an increased speed

    (c)

    move with a decreased speed

    (d)

    move in a different direction

  2. Unit of pressure is

    (a)

    pascal

    (b)

    N m–2

    (c)

    poise

    (d)

    Both (a) & (b)

  3. Pascal’s law is used in

    (a)

    hydraulic lift

    (b)

    brake system

    (c)

    pressing heavy bundles

    (d)

    All the above

  4. Which of the following liquids has more viscosity?

    (a)

    Grease

    (b)

    Water

    (c)

    Coconut oil

    (d)

    Ghee

  5. The unit of viscosity is

    (a)

    N m2

    (b)

    poise

    (c)

    kg m s–1

    (d)

    no unit

  6. _______is the force acting perpendicularly on any given surface area of a body

    (a)

    Pressure

    (b)

    Thrust

    (c)

    Density

    (d)

    Volume

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

    (a)

    Not vary

    (b)

    increases

    (c)

    decreases

    (d)

    charge

  8. Rain drops are spherical in nature because of _________

    (a)

    Frictional force

    (b)

    Buoyant force

    (c)

    Surface tension

    (d)

    Viscous force

  9. The unit for surface tension is _________

    (a)

    Nm

    (b)

    N-1m

    (c)

    N-1m-1

    (d)

    Nm-1

  10. If the area of contact is greater, then the ______ will be greater.

    (a)

    Pressure

    (b)

    Temperature

    (c)

    Friction

    (d)

    Force

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