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General Knowledge :: Physics

  1. Which is a correct way to measure wavelength?

  2. A.

     Nearest peak to peak

    B.

     Nearest peak to nearest trough

    C.

     Nearest trough to peak

    D.

     None of the above


  3. If the phase difference between two points is 120° for a wave with velocity of 360 m/s and frequency 500 Hz, then path difference between the two points is

  4. A.

     1 cm

    B.

     6 cm

    C.

     12 cm

    D.

     24 cm


  5. Why are we able to hear short wave broadcasts better than long wave broadcasts ?

  6. A.

     Short waves are more energetic than long waves.

    B.

     Short waves are unaffected by atmospheric disturbances.

    C.

     Short wave broadcasts are made by nearby radio stations.

    D.

     By convention, short waves are meant for long distances, whereas long waves are reserved for short distances.


  7. The frequency of ultrasound wave is typically

  8. A.

     Above 20 kHz

    B.

     Above 20,000 kHz

    C.

     Below 20 kHz

    D.

     Below 02 kHz


  9. Which of the following has the highest frequency?

  10. A.

     Cosmic rays

    B.

     X-rays

    C.

     Radio waves

    D.

     Microwaves


  11. Matter waves are

  12. A.

     De Broglie waves

    B.

     Electromagnetic waves

    C.

     Transverse waves

    D.

     Longitudinal waves


  13. Two waves, each of amplitude 1.5 mm and frequency 10 Hz, are travelling in opposite direction with a speed of 20 mm/s. The distance in mm between adjacent nodes is :

  14. A.

     1.0

    B.

     1.2

    C.

     1.5

    D.

     2.0


  15. Intensity of any wave is proportional to which of the following?

  16. A.

     Amplitude

    B.

     Square of amplitude

    C.

     Square root of amplitude

    D.

     Cube of amplitude


  17. If density of oxygen is 16 times that of hydrogen, what will be their corresponding ratio of velocity of sound?

  18. A.

     4 : 1

    B.

     2 : 1

    C.

     1 : 16

    D.

     1 : 4


  19. Which one of the following statements with regard to Jet stream, an upper level tropospheric wave, is not correct?

  20. A.

     It is narrow band of high-velocity wind.

    B.

     It follows the wave path near the tropopause at elevations of 8 km to 15 km.

    C.

     Jet streams are typically continuous over long distances.

    D.

     In summer, the polar front jet achieves its maximum force.