Home / General Knowledge / Physics :: section - 5

General Knowledge :: Physics

  1. Noise is measured in

  2. A.

     Watt

    B.

     REM

    C.

     Centigrade

    D.

     Decibel


  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


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

  6. A.

     Barometer

    B.

     Hydrometer

    C.

     Hygrometer

    D.

     Sonometer


  7. Among the following materials sound travels fastest in

  8. A.

     Steel

    B.

     Air

    C.

     Vacuum

    D.

     Water


  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


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

  12. A.

     Decibel

    B.

     Newton

    C.

     Heartz

    D.

     Tesla


  13. Sound cannot pass through

  14. A.

     Water

    B.

     Steel

    C.

     Air

    D.

     Vacuum


  15. Sound waves cannot travel in

  16. A.

     Vacuum

    B.

     Water

    C.

     Glass

    D.

     Hydrogen gas


  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


  19. Which determines the frequency of a sound wave?

  20. A.

     Amplitude

    B.

     Speed

    C.

     Source

    D.

     Medium