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General Knowledge :: Physics

  1. Noise is measured in

  2. A.

     Watt

    B.

     REM

    C.

     Centigrade

    D.

     Decibel

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  3. Man perceives sound vibrations in the frequency ranges of

  4. A.

     0 – 5 Hz

    B.

     6 – 10 Hz

    C.

     11 – 20 Hz

    D.

     20 – 20000 Hz

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  5. Instrument used to study the behaviour of a vibrating string is :

  6. A.

     Barometer

    B.

     Hydrometer

    C.

     Hygrometer

    D.

     Sonometer

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  7. Among the following materials sound travels fastest in

  8. A.

     Steel

    B.

     Air

    C.

     Vacuum

    D.

     Water

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  9. Sound becomes hazardous noise pollution at decibels?

  10. A.

     Above 120 db

    B.

     Above 80 db

    C.

     Above 50 db

    D.

     Above 30 db

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  11. What is the SI unit of intensity of sound?

  12. A.

     Decibel

    B.

     Newton

    C.

     Heartz

    D.

     Tesla

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  13. Sound cannot pass through

  14. A.

     Water

    B.

     Steel

    C.

     Air

    D.

     Vacuum

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  15. Sound waves cannot travel in

  16. A.

     Vacuum

    B.

     Water

    C.

     Glass

    D.

     Hydrogen gas

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  17. The quality or tone of a musical sound produced by a stringed instrument depends on

  18. A.

     Frequency of vibration

    B.

     Length of the strings in the instrument

    C.

     Amplitude of vibration

    D.

     Wave form of the sound

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  19. Which determines the frequency of a sound wave?

  20. A.

     Amplitude

    B.

     Speed

    C.

     Source

    D.

     Medium

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