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
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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