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General Knowledge :: Physics

  1. Lightning heats the surrounding air to

  2. A.

     300 deg Cent

    B.

     3000 deg Cent

    C.

     30000 deg Cent

    D.

     300000 deg Cent


  3. Which of the following is not an intrusive igneous body?

  4. A.

     Stock

    B.

     Dike

    C.

     Stope

    D.

     Batholith


  5. The instrument for measuring intensity of earthquakes is called

  6. A.

     Ediograph

    B.

     Pantagraph

    C.

     Ergograph

    D.

     Seismograph


  7. An instrument that records earthquakes is

  8. A.

     Ergograph

    B.

     Ediograph

    C.

     Thermograph

    D.

     Seismograph


  9. To prevent damage from lightning, lightning conductors are used on tall structures. The lightning conductor

  10. A.

     Should be made of a good conductor but can be of any shape

    B.

     Should be in the form of a vertical rod

    C.

     Can be of any shape

    D.

     Should be made of a good conductor like copper with sharp-pointed edges


  11. The number of waves per second in a sound is called ________ of that sound.

  12. A.

     Velocity

    B.

     Frequency

    C.

     Displacement

    D.

     Acceleration


  13. Sound waves do not show the phenomenon of

  14. A.

     Refraction

    B.

     Interference

    C.

     Diffraction

    D.

     Polarisation


  15. Speed of sound is maximum in which among the following?

  16. A.

     Gases

    B.

     Vaccum

    C.

     Liquids

    D.

     Solids


  17. The ringing of an electric bell in an enclosed evacuated glass bell jar is not heard outside because

  18. A.

     The ringing is not loud enough

    B.

     The glass of the bell jar absorbs the sound waves

    C.

     The bell jar is too small

    D.

     There is no air or any other gas in the bell jar


  19. What is the full form of "RADAR" ?

  20. A.

     Radio Detecting and Ranging

    B.

     Region Device and Ranging

    C.

     Radio Detect and Rangs

    D.

     Radio Device and Ranging