MULTIPLE CHOICE QUESTIONS: (MCQ’s)
1. The characteristic of sound which determines its loudness is _____.
(a) Frequency
(b) Pitch
(c) Amplitude
(d) Intensity
2. Pitch of sound increases when its _____.
(a) Amplitude increases
(b) Frequency increases
(c) Wavelength increases
(d) Intensity increases
3. The pitch of sound is said to be higher when ____.
(a) The amplitude is higher
(b) The wavelength is longer
(c) The frequency is higher
(d) Time period is longer
4. The sound of a violin can be distinguished from the sound of a guitar because of the____.
(a) Wavelength of their sound
(b) Pitch of their sound
(c) Amplitude of their sound waves
(d) Intensity of their sound
5. The number of oscillations per unit time is called______
(a) Pitch
(b) Amplitude
(c) Time period
(d) Frequency
6. The amount of sound passing through a unit area in one second is called ____.
(a) Loudness
(b) Pitch
(c) Intensity
(d) Timbre
7. Sound of single frequency is called ____.
(a) Echo
(b) Note
(c) Tone
(d) Sonic boom
8. Music is an example of____.
(a) Ultrasound
(b) Infrasound
(c) Tone
(d) Note
9. A loud sound has _____.
(a) Higher pitch
(b) Longer wavelength
(c) Greater amplitude
(d) Higher frequency
10. The relationship of the speed of sound of frequency ‘V’,wavelength λ and period T’ is ______
(a) vT
(b) λ/t
(c) vλ
(d) vλ T
11. For the human ear, audible sound is of the frequency range _____.
(a) 5 Hz to 20 Hz
(b) 20 Hz to 5 kHz
(c) 5 kHz to 20 kHz
(d) 20 Hz to 20 kHz
12. Infrasound is the sound of frequency ____.
(a) Below 20 Hz
(b) Above 20 Hz
(c) Above 20 kHz
(d) Below 20 kHz
13. A sound wave transfer ____.
(a) Only energy from one place to another
(b) Only particles from one place to another
(c) Energy as well as particles from one place to another
(d) Neither energy nor particles from one place to another
14. In the graphical representation of a longitudinal wave the _____.
(a) Crest represents rarefaction
(b) Crest represents compression
(c) Trough represents compression
(d) Trough represents both compression as well as rarefaction
15. The waves that travel as compressions and rarefactions are ______
(a) Transverse waves
(b) Longitudinal waves
(c) Transverse as well as longitudinal waves
(d) Neither transverse nor longitudinal waves
16. The method of determining the depth of the sea using ultrasound is called _____
(a) Ultrasonography
(b) Echo-ranging
(c) Echocardiography
(d) Reverberation
17. The frequency of a wave is 2 Hz. Therefore its period is _____.
(a) 2 seconds
(b) ½ second
(c) 1 second
(d) 20 seconds
18. To hear an echo the surface reflecting the sound waves should be at a minimum distance of _____.
(a) 17.2 m
(b) 3.44 m
(c) 34.4 m
(d) 344 m
19. The characteristic which enables us to distinguish two sounds having the same pitch and loudness is ____.
(a) Frequency
(b) Pitch
(c) Amplitude
(d) Timbre
20. Timbre depends upon _____.
(a) Wavelength of the sound waves
(b) Pitch of the sound
(c) Amplitude of sound waves
(d) The shapes of the sound waves.
21. The part of the ear that collects sound waves is ____.
(a) The cochlea
(b) The anvil
(c) The pinna
(d) The ear drum
22. Sound travels in air if ____.
(а) Particles of medium travel from one place to another
(b) There is no moisture in the atmosphere
(c) Disturbance moves
(d) Both particles as well as disturbance travel from one place to another.
23. When we change feeble sound to loud sound we increase its ____.
(a) Frequency
(b) Amplitude
(c) Velocity
(d) Wavelength
24. Earthquake produces which kind of sound before the main shock wave begins _____.
(a) Ultrasound
(b) Infrasound
(c) Audible sound
(d) None of the above
25. 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) Intensity of sound only
(b) Amplitude of sound only
(c) Frequency of the sitar string with the frequency of other musical instruments
(d) Loudness of sound
26. Sound of frequency below ____ is called infrasonic sound.
(a) 10 Hz
(b) 20 Hz
(c) 100 Hz
(d) 50 Hz
27. ____ is a medical instrument used for listening to sound produced withing the body, chiefly in the heart or lungs.
(a) Funnel
(b) Electroscope
(c) Cardiograph
(d) Stethoscope
28. The technique of obtaining images of internal organs of the body by using ultrasonic waves is called ____
(a) Ultrasonography
(b) Echocardiography
(c) Imaging
(d) None of the above
29. A peak is called the ______ of a wave
(a) Crest
(b) Trough
(c) Wavelength
(d) Intensity
30. _______ is a measure of the response of the ear to the sound
(a) Shrillness
(b) Loudness
(c) Wavelength
(d) Intensity
Answers:
1. (c) Amplitude
2. (b) Frequency increases
3. (b) The frequency is higher
4. (b) Pitch of their sound
5. (d) Frequency
6. (c) Intensity
7. (c) Tone
8. (d) Note
9. (c) Greater amplitude
10. (c) vλ
11. (d) 20 Hz to 20 kHz
12. (a) Below 20 Hz
13. (a) Only energy from one place to another
14. (b) The crest represents compression
15. (b) Are longitudinal waves
16. (b) Echo-ranging
17. (b) Second
18. (a)17.2 m
19. (d) Timbre
20. (d) The shapes of the sound waves
21. (c) Longitudinal waves
22. (d) Both particles as well as disturbance travel from one place to another.
23. (b) Amplitude
24.(a) Ultrasound
25.(c) Frequency of the sitar string with the frequency of other musical instruments
26.(b) 20 Hz
27. (d) Stethoscope
28. (a) Ultrasonography
29. (a) Crest
30. (b) Loudness
