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  1. Ball pen functions on the principle of :

  2. A.

     Viscosity

    B.

     Boyle's Law

    C.

     Gravitational force

    D.

     Surface tension

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  3. When a detergent is added to pure water, its surface tension

  4. A.

     Increases

    B.

     Decreases

    C.

     Remains constant

    D.

     Becomes infinite

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  5. Pieces of camphor placed on water move about rapidly. This is because of

  6. A.

     Diffusion

    B.

     Viscosity

    C.

     Surface tension

    D.

     Capillarity

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  7. What is unit of Viscosity ?

  8. A.

     Coulomb

    B.

     Newton second per square meter

    C.

     Watt per meter per degree celcius

    D.

     Joule per kilogram per Kelvin

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  9. The hair of shaving brush clings together when removed from water due to

  10. A.

     Surface tension

    B.

     Viscosity

    C.

     Elasticity

    D.

     Friction

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  11. A body falling through a liquid acquires a steady velocity is known as

  12. A.

     End velocity

    B.

     Touch down velocity

    C.

     Terminal velocity

    D.

     Steady state velocity

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  13. The spoon dropped by an astronaut in a satellite will

  14. A.

     Fall to the floor

    B.

     Remain stationary

    C.

     Continue to follow the motion of the satellite

    D.

     Move tangentially away

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  15. An aircraft can perform aerobatic manoeuvres in a vertical loop because of

  16. A.

     Gravity

    B.

     Centripetal force

    C.

     Weight

    D.

     Centrifugal force

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  17. Which one is not a part of Kepler's Law?

  18. A.

     Law of orbits

    B.

     Law of areas

    C.

     Law of speed

    D.

     Law of periods

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  19. Kepler's law of planetary motion states that the square of the time period is proportional to the

  20. A.

     Semi-major axis

    B.

     Square of the semi-major axis

    C.

     Cube of the semi-major axis

    D.

     Fourth power of the semi-major axis

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