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  1. The intensity ratio of waves is 25 : 9. What is the ratio of their amplitudes?

    2. A.

     50 : 18
    B.

     25 : 9
    C.

     3 : 5
    D.

     5 : 3

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  2. The velocity of sound in air

    3. A.

     Decreases with increase of temperature
    B.

     Increases with decrease of temperature
    C.

     Does not depend on temperature
    D.

     Decreases with decrease of temperature

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  3. Infrasonic sound has a frequency lower than

    4. A.

     5 Hz
    B.

     15 Hz
    C.

     20 Hz
    D.

     32 Hz

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  4. When a vibrating tuning fork is placed on a table, a loud sound is heard. This is due to :

    5. A.

     Reflection
    B.

     Refraction
    C.

     Forced vibrations
    D.

     Damped vibrations

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  5. Quality of a musical note depends on

    6. A.

     Fundamental frequency
    B.

     Amplitude of the wave
    C.

     Harmonics present
    D.

     Velocity of sound in the medium

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  6. If a band is played on the moon the sound will

    7. A.

     Reverberate
    B.

     Be heard by us faintly
    C.

     Be heard upto 10km from it
    D.

     Not be heard at any distance at all from it

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  7. The shape of our milky way galaxy is

    8. A.

     Circular
    B.

     Elliptical
    C.

     Spiral
    D.

     None of the above

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  8. The colours of stars depend on their

    9. A.

     Temperature
    B.

     Distance
    C.

     Radius
    D.

     Atmospheric pressure

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  9. The substance which conducts current in the solid state is

    10. A.

     Diamond
    B.

     Graphite
    C.

     Iodine
    D.

     Sodium chloride

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  10. Electric current is measured by which instrument?

    11. A.

     Voltmeter
    B.

     Ammeter
    C.

     Barometer
    D.

     Sinometer

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