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General Knowledge :: Physics

  1. The atmospheric air is held to the Earth by :

  2. A.

     Gravity

    B.

     Winds

    C.

     Clouds

    D.

     Rotation of the Earth


  3. The pressure of a fluid varies with depth h as P = PQ+pgh, where p is the fluid density. This expression is associated with

  4. A.

     Pascal's law

    B.

     Newton's law

    C.

     Bernoulli's principle

    D.

     Archimedes' principle


  5. A parachute descends slowly whereas a stone dropped from the same height falls rapidly, because

  6. A.

     Stone is heavier than parachute

    B.

     Special mechanisms are present in parachute

    C.

     A parachute has a larger surface area and air resistance is more

    D.

     None of these


  7. Why does bleeding occur through the nose in high mountainous regions ?

  8. A.

     The pressure of blood in capillaries is greater than the outside pressure

    B.

     The pressure at high altitudes is greater than that on the plains

    C.

     The blood pressure of a person increases at high altitudes

    D.

     The blood pressure fluctuates and finally decreases drastically


  9. Which of the following instruments is used to measure humidity ?

  10. A.

     Kata Thermometer

    B.

     Anemometer

    C.

     Sling Psychrometer

    D.

     Clinical Thermometer


  11. Anemometer is an instrument meant for measuring ________

  12. A.

     Velocity

    B.

     Air masses

    C.

     Wind speed

    D.

     Temperature


  13. A fountain pen works on the principle of

  14. A.

     Flow of liquids from higher to lower potential

    B.

     Capillary action

    C.

     Bernoulli's principle

    D.

     Viscosity of liquids


  15. A barometer is kept inside a bell jar. Air is slowly pumped out of the jar.

  16. A.

     The mercury level starts rising

    B.

     The mercury level starts falling

    C.

     The mercury level does not change

    D.

     The bell jar breaks up


  17. The temperature at which water boils depends mainly on

  18. A.

     Air Pressure

    B.

     Specific heat

    C.

     Density

    D.

     Relative humidity


  19. Air pressure is measured in which of the following units?

  20. A.

     Steridian

    B.

     Kg/mts

    C.

     Newton

    D.

     Pascal