Oscillations MCQ

Questions

    Oscillations MCQ. We covered all the Oscillations MCQ in this post for free so that you can practice well for the exam.

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    MCQ on Oscillations for Students

    Quick Quiz

    Select the irrelevant statement

    (a) Compressions are the regions where particles are crowded together

    (b) Compressions are represented by the upper portion of the curve in the density-distance graph

    (c) Rarefactions are where particles are spread apart

    (d) Valleys are represented by the straight line

    Option d – Valleys are represented by the straight line

    Bats can hunt at night

    (a) their eyesight is good

    (b) they can smell their prey

    (c) the high-pitched ultrasonic squeaks of the pat are reflected from the obstacles or prey and returned to the bat’s ear and thus the bat is able to detect.

    (d) All of the above

    Option c – the high-pitched ultrasonic squeaks of the pat are reflected from the obstacles or prey and returned to the bat’s ear and thus the bat is able to detect

    Which of the following statements is/are correct about sound? (i) Sound is produced by a vibrating body. (ii) Sound needs a medium for propagation. (iii) If 2 sounds are equally loud, then their pitch will also be equal.

    (a) (i) & (iii)

    (b) only (iii)

    (c) (i), (ii) & (iii)

    (d) (i) & (ii)

    Option d – (i) & (ii)

    Which of the following is true about the speed of sound? (i) Sound propagates through a medium at a finite speed. (ii) The speed of sound decreases when we go from a solid to a gaseous state. (iii) Speed of sound increases with an increase in temp.

    (a) only (i)

    (b) (i) & (iii)

    (c) (i), (ii) & (iii)

    (d) (i) & (ii)

    Option c – (i), (ii) & (iii)

    Select the odd one out

    (a) S.I. Unit is hertz (Hz)

    (b) Frequency = 1 / Time Period

    (c) Objects vibrating at different frequencies produce the same pitch

    (d) Higher the frequency, the higher the pitch

    Option c – Objects vibrating at different frequencies produce the same pitch

    A key of a mechanical piano struck gently and then struck again but much harder this time. In the second case

    (a) sound will be louder but the pitch will not be different

    (b) sound will be louder and the pitch will also be higher

    (c) sound will be louder but the pitch will be lower

    (d) both loudness and pitch will remain unaffected

    Option a – sound will be louder but the pitch will not be different

    Objects of different sizes and conditions vibrate at different

    (a) Frequencies to produce sounds of different pitches

    (b) Frequencies to produce sounds of the same pitch

    (c) Time intervals

    (d) Energy levels

    Option a – Frequencies to produce sounds of different pitches

    An earthquake produces which kind of sound before the main shock wave begins

    (a) ultrasound

    (b) infrasound

    (c) audible sound

    (d) None of the above

    Option b – infrasound

    Before playing the orchestra in a musical concert, a sitarist tries to adjust the tension and pluck the string suitably. By doing so, he is adjusting

    (a) the intensity of sound only

    (b) the amplitude of sound only

    (c) the frequency of the sitar string with the frequency of other musical instruments

    (d) the loudness of sound

    Option c – the frequency of the sitar string with the frequency of other musical instruments

    Loud and soft sounds can have the same

    (a) amplitude

    (b) frequency

    (c) wavelength

    (d) None of these

    Option b – frequency

    The amount of sound energy passing each second through a unit area is called

    (a) Loudness or Intensity of sound

    (b) Amplitude of sound

    (c) Pitch of the sound

    (d) Frequency of sound

    Option a – Loudness or Intensity of sound

    Speed of sound

    (a) Decreases when we go from a solid to a gaseous state

    (b) Increases with an increase in temperature

    (c) Depends upon properties of the medium through which it travels

    (d) All these statements are correct

    Option d – All these statements are correct

    The frequency of a source of sound is 100 Hz. How many times does it vibrate in a minute?

    (a) 6000

    (b) 2000

    (c) 5500

    (d) 4500

    Option a – 6000

    Sound waves have the following frequencies that are audible to human beings

    (a) 5 c/s

    (b) 27000 c/s

    (c) 5000 c/s

    (d) 50,000 c/s

    Option c – 5000 c/s

    From a point source, if the amplitude of waves at a distance r is A, its amplitude at a distance 2r will be

    (a) A

    (b) 2 A

    (c) A/2

    (d) A/4

    Option c – A/2

    When we change feeble sound to loud sound we increase its

    (a) frequency

    (b) amplitude

    (c) velocity

    (d) wavelength

    Option b – amplitude

    A wave of frequency 1000 Hz travels between X and Y, a distance of 600 m in 2 sec. How many wavelengths are there in distance XY

    (a) 3.3

    (b) 300

    (c) 180

    (d) 2000

    Option d – 2000

    The material used for making the seats in an auditorium has sound-absorbing properties. Why?

    (a) It reduces reverberations.

    (b) It makes the quality of sound better

    (c) It makes the sound travel faster

    (d) All of the above

    Option a – It reduces reverberations

    Sound cannot travel though

    (a) solids

    (b) liquids

    (c) gases

    (d) vacuum

    Option d – vacuum

    To hear a distinct echo, the minimum distance of a reflecting surface should be :

    (a) 17 meters

    (b) 34 meters

    (c) 68 meters

    (d) 340 meters

    Option a – 17 meters

    Sound can be characterized by its

    (a) frequency only

    (b) amplitude only

    (c) speed only

    (d) frequency, amplitude, and speed

    Option d – frequency, amplitude, and speed

    Which one of the following materials will reflect sound better? ( Oscillations MCQ )

    (a) Thermocole

    (b) Curtain made from cloth

    (c) Steel

    (d) Paper

    Option c – Steel

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