Practice test

Oscillation and waves - Test Set 5

Review 20 exam-focused questions with detailed explanations, then start the interactive test when you are ready.

20 questions

Questions and explanations

  1. Question 1

    The basic units of sound are called:
    1. Morphemes
    2. Phonemes
    3. Semanteme
    4. Syntax
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  2. Question 2

    Which of the following represents the decibel level of rustling of tree leaves in normal circumstance?
    1. 10 db
    2. 20 db
    3. 60 db
    4. 100 db
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  3. Question 3

    Which of the following property of sound is affected by change in air temperature?
    1. Frequency
    2. Intensity
    3. Amplitude
    4. Wavelength
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  4. Question 4

    Noise pollution is created if noise is in excess to:
    1. 70-75 db
    2. 50-60 db
    3. 80-99 db
    4. 40-65 db
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  5. Question 5

    Sound waves cannot travel through a:
    1. Copper wire placed in air
    2. Silver slab placed in air
    3. Glass prism placed in water
    4. Wooden hollow pipe placed in vacuum
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  6. Question 6

    Which one of the following statements is correct? The velocity of sound:
    1. Does not depend upon the nature of media.
    2. Is maximum in gases and minimum in liquids.
    3. iI maximum in solids and minimum in liquids.
    4. Is maximum in solids and minimum in gases.
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  7. Question 7

    When sound waves are propagated through a medium, the physical quantity/ quantities transmitted is/are:
    1. Matter only
    2. Energy only
    3. Energy and matter only
    4. Energy, momentum and matter
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  8. Question 8

    Which one of the following statements is not correct?
    1. Pitch of a sound is its characteristic by which we can generally differentiate between a male voice and a female voice.
    2. The loudness of sound is related to its frequency.
    3. A musical sound has certain well defined frequencies, which are generally harmonics of a fundamental frequency.
    4. The timbre of a particular musical sound is related to the waveform of the sound wave.
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  9. Question 9

    Which one of the following statements is correct?
    1. The speed of sound waves in a medium depends upon the elastic property of the medium, but not on an inertia property.
    2. The speed of sound waves in a medium depends neither on its elastic property nor on its inertia property.
    3. The speed of sound waves in a medium depends on both elastic and inertia properties of the medium.
    4. The speed of sound waves in a medium depends upon the inertia property of the medium, but not on an elastic property.
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  10. Question 10

    Assertion (A) The pitch of sound wave depends upon its frequency.
    Reason (R) The loudness of the sound wave depends upon its amplitude.
    1. If both Assertion and Reason are true and Reason is the correct explanation of the Assertion.
    2. If both Assertion and Reason are true but Reason is not the correct explanation of the Assertion.
    3. Assertion is true but Reason is false.
    4. If both Assertion is false but Reason is true.
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  11. Question 11

    Assertion (A) Sound waves cannot propagate in vacuum.
    Reason (R) Sound waves are elastic waves and require a medium to propagate.
    1. If both Assertion and Reason are true and Reason is the correct explanation of the Assertion.
    2. If both Assertion and Reason are true but Reason is not the correct explanation of the Assertion.
    3. Assertion is true but Reason is false.
    4. If both Assertion is false but Reason is true.
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  12. Question 12

    Bats detect obstacles in their path by receiving the reflected:
    1. Infrasonic waves
    2. Ultrasonic waves
    3. Radio waves
    4. Micro waves
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  13. Question 13

    Ultrasonic waves are produced by making use of:
    1. Ferromagnetic material
    2. Ferrimagnetic material
    3. Piezoelectric material
    4. Pyroelectrical material
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  14. Question 14

    Compared to audible sound waves, ultrasound waves have:
    1. Higher speed
    2. Higher frequency
    3. Both (a) and (b)
    4. Long wavelength
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  15. Question 15

    The frequency of ultrasonic waves is:
    1. Less than 20 Hz
    2. Between 20 Hz and 2 kHz
    3. Between 2 kHz and 20 kHz
    4. Greater than 20 kHz
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  16. Question 16

    What is the audible range of humans?
    1. 0-200 Hz
    2. 20-200 Hz
    3. 200-2000 Hz
    4. 20-20,000 Hz
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  17. Question 17

    To hear a distinct echo, the time interval between the original sound and reflected sound must be atleast …… .
    1. 0.1 s
    2. 0.2 s
    3. 0.3 s
    4. 0.4 s
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  18. Question 18

    Which one of the following statements is not correct?
    1. Sound waves in gases are longitudinal in nature.
    2. Sound waves having higher amplitudes are louder.
    3. Sound waves having frequency below 20 Hz are known as ultrasonic waves.
    4. Sound waves with high audible frequencies are sharp.
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  19. Question 19

    An echo is heard after 5s of the production of sound which moves with a speed of 340 m/s. What is the distance of the mountain from the source of sound which produced the echo?
    1. 0.085 km
    2. 0.85 km
    3. 0.17 km
    4. 1.7 km
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  20. Question 20

    Which one of the following statements is not correct?
    1. Ultrasonic waves cannot get reflected, refracted or absorbed.
    2. Ultrasonic waves are used to detect the presence of defects like cracks, porstty, etc. in the internal structure of common structure materials.
    3. Ultrasonic waves can be used for making holes in very hard materials like diamond.
    4. Ultrasonic waves cannot travel through vacuum.
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