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- Answered
- Review
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Question 1 of 55
1. Question
1 pointsWhat kind of motion produces sound in an object?
(a) Rotational motion (b) To and fro motion (c) Translational motion (d) Circular motion
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Question 2 of 55
2. Question
1 pointsWhen a tightly stretched band is plucked, it produces sound due to
(a) force applied on it (b) pressure exerted on it (c) vibrations produced in it (d) friction in air
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Question 3 of 55
3. Question
1 pointsWe can see vibration in the vibrating body due to its
(a) small amplitude (b) large amplitude (c) to and fro motion (d) none of these
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Question 4 of 55
4. Question
1 pointsIdentify the group of stringed instruments.
(a) Drum, tabla, mridangam (b) Flute, shehnai, violin
(c) Sitar, guitar, ektara (d) Shehnai, mridangam, tabla
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Question 5 of 55
5. Question
1 pointsWhich of the following musical instruments produces sound by stretched membrane vibrating part?
(a) Sitar (b) Veena (c) Shehnai (d) Manjira
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Question 6 of 55
6. Question
1 pointsIn human, the sound is produced by the
(a) windpipe (b) lungs (c) larynx (d) both (b) and (c).
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Question 7 of 55
7. Question
1 pointsThe sound in the human voice is produced by vibrations of the…………………… . in the throat
(a) windpipe (b) voice box (c) vocal cords (d) larynx
Correct
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Question 8 of 55
8. Question
1 points…………………….. is/are stretched across the voice box to produce sound in humans.
(a) Vocal cords (b) Lungs (c) Windpipe (d) Muscles
Correct
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Question 9 of 55
9. Question
1 pointsThe vocal cords in men are about
(a) 5 mm long (b) 10 mm long (c) 15 mm long (d) 20 mm long.
Correct
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Question 10 of 55
10. Question
1 pointsIn which of the following sound cannot travel through?
(a) Gas (b) Solid (c) Liquid (d) Vacuum
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Question 11 of 55
11. Question
1 pointsSound can travel through solid that is
(a) wood only (b) metal only
(c) plastic only (d) either wood or metal or plastic.
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Question 12 of 55
12. Question
1 pointsLoudness of the sound can be decreased if we……………………………. the air in the tumbler containing ringing mobile phone.
(a) increase (b) decrease
(c) either increase or decrease (d) neither increase nor decrease
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Question 13 of 55
13. Question
1 pointsIn human ear,………………………… vibrates when hit by sound waves.
(a) outer ear (b) inner ear (c) eardrum (d) earflap
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Question 14 of 55
14. Question
1 points……………………… sends vibrations to inner ear.
(a) Eardrum (b) Outer ear (c) Earflap (d) Middle ear
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Question 15 of 55
15. Question
1 pointsSharp, pointed objects should never be inserted into or used to clean the ears because it can damage
(a) middle ear (b) inner ear (c) earflap (d) eardrum
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Question 16 of 55
16. Question
1 pointsWhich of the following parameters can characterise the vibration of sound?
(a) Amplitude and frequency only (b) Amplitude and time period only
(c) Frequency and time period only (d) Frequency, amplitude and time period
Correct
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Question 17 of 55
17. Question
1 pointsFrequency of a sound is
(a) to and fro motion of an object (b) the number of oscillations per second
(c) time taken to complete one oscillation (d) none of these
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Question 18 of 55
18. Question
1 points…………………. Decides the loudness of sound
(a) Frequency (b) Amplitude
(c) Pitch (d) Vibrations in one second
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Question 19 of 55
19. Question
1 pointsThe pitch or shrillness of a sound is determined by…………………………………. Of Vibrations.
(a) to and fro motion (b) amplitude (c) loudness (d) frequency
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Question 20 of 55
20. Question
1 pointsIf an object oscillates 200 times in one second, its frequency is
(a) 20 Hz (b) 100 Hz (c) 50 Hz (d) 200 Hz
Correct
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Question 21 of 55
21. Question
1 pointsWhich of the following frequency ranges can be detected by human ear?
(a) Less than 20 kHz (b) Less than 20 kHz but more than 20 Hz
(c) Higher than 20 kHz but less than 20 Hz (d) More than 20 Hz
Correct
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Question 22 of 55
22. Question
1 pointsCorrect
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Question 23 of 55
23. Question
1 pointsWhat is inaudible sound?
(a) Sound of frequency less than 20 kHz (b) Sound of frequency less than 20 Hz
(c) Sound of frequency between 20 Hz to 20 kHz (d) Sound of frequency greater than 20 Hz
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Question 24 of 55
24. Question
1 pointsThe ultrasound equipment works at frequencies
(a) lower than 20000 Hz (b) higher than 20000 Hz
(c) lower than 20 Hz (d) higher than 20 Hz
Correct
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Question 25 of 55
25. Question
1 pointsWhich of the following produces pleasant sound?
(a) Sound of too many people talking (b) Sound of machines
(c) Sound of barking dogs (d) None of these
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Question 26 of 55
26. Question
1 pointsWhich of the following produces unpleasant sound?
(a) Sound of birds (b) Sound produced by horns
(c) Sound produced by strings of sitar (d) Sound produced by piano
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Question 27 of 55
27. Question
1 pointsMusical instruments produce
(a) noise when played loudly (b) melodious sound
(c) unpleasant sound (d) both (a) and (b)
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Question 28 of 55
28. Question
1 pointsNoise pollution is caused by
(a) explosions including bursting of crackers, (b) the use of loudspeakers
(c) factory machinery (d) all of these
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Question 29 of 55
29. Question
1 pointsWhich of the following health hazards is/are caused by noise pollution?
(a) Lack of sleep (b) High blood pressure (c) Anxiety (d) All of these
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Question 30 of 55
30. Question
1 pointsWhich of the following do not control noise pollution?
(a) Wearing ear plugs and muffs in noisy factories
(b) The silencing device installed in home appliances and transport vehicles
(c) Trees planted along the roads and around buildings
(d) None of these
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Question 31 of 55
31. Question
1 pointsSound can travel through
(a) gases and liquids only (b) liquids and solids only
(c) solids and gases only (d) solids, liquids and gases.
Correct
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Question 32 of 55
32. Question
1 pointsWhich of the following produces……………..of lowest frequency of sound?
(a) A man (b) A boy (c) A girl (d) A woman
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Question 33 of 55
33. Question
1 pointsIf sound produced by any animal is of frequency 5 Hz then it is………………………….. range of frequency.
(a) audible (b) ultrasonic (c) infrasonic (d) both (a) and (b)
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Question 34 of 55
34. Question
1 pointsThe voices of men, women and children are different. Which of the following organ is responsible for this?
(a) Larynx (b) Windpipe (c) Muscles (d) Vocal cords
Correct
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Question 35 of 55
35. Question
1 pointsThe length of vocal cord is
(a) maximum in women (b) maximum in children
(c) maximum in men (d) same in women and children
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Question 36 of 55
36. Question
1 pointsWhat is the frequency of voice when the vocal cords are tight and thin?
(a) High (b) Low (c) Zero (d) Cannot say
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Question 37 of 55
37. Question
1 pointsCorrect
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Question 38 of 55
38. Question
1 pointsSound is a form of
(a) light (b) energy (c) heat (d) none of these
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Question 39 of 55
39. Question
1 pointsIn which of the following the speed of sound is maximum?
(a) Hydrogen (b) Mercury (c) Diamond (d) Same in all
Correct
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Question 40 of 55
40. Question
1 pointsWhich of the following statements is true?
(a) Sound produces vibrations. (b) Sound travels at different speed in same media.
(c) Speed of sound is greater in gold than in oxygen. (d) Larynx is the ligaments of vocal cord.
Correct
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Question 41 of 55
41. Question
1 pointsThe speed of sound is maximum in………………………….. and minimum in……………………… .
(a) gases; liquids (b) liquids; solids (c) solids; gases (d) gases; solids
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Question 42 of 55
42. Question
1 pointsWhich part of ear collects the sound from the surroundings?
(a) Eardrum (b) Canal (c) Pinna (d) Auditory nerves
Correct
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Question 43 of 55
43. Question
1 pointsWhich of the following is the example of high pitch sound?
(a) Buzzing of mosquitoes (b) Beating of a drum
(c) Roar of a lion (d) None of these
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Question 44 of 55
44. Question
1 pointsSounds of frequency higher than 20 kHz are
(a) infrasonic sounds (b) ultrasonic sounds (c) sonic sounds (d) audible sounds.
Correct
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Question 45 of 55
45. Question
1 pointsWhich of the following is correct regarding emitted range of frequency of sound?
(a) Dolphin – infrasonic sound (b) Bats- Sonic sound
(c) Whale – Infrasonic sound (d) Elephant- Ultrasonic sound
Correct
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Question 46 of 55
46. Question
1 pointsWhat vibrates to produce sound in cymbals musical instrument?
(a) Stretched-string (b) Stretched-membrane (c) Vibrating column of air (d) Both (b) and (c)
Correct
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Question 47 of 55
47. Question
1 pointsA reflected sound is called
(a) music (b) noise (c) echo (d) vibration.
Correct
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Question 48 of 55
48. Question
1 pointsCorrect
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Question 49 of 55
49. Question
1 pointsAn object produces sound of 10 Hz.
Which of the following is correct?
(a) It produces sound which we cannot hear
(b) It produces sound which we can hear
(c) It does not produce sound.
(d) It produces sound which we can hear but it causes temporary deafness.
Correct
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Question 50 of 55
50. Question
1 pointsWhich of the following characteristics of sound depends on the frequency of vibrations?
(a) Pitch (b) Speed (c) Loudness (d) Quality
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Question 51 of 55
51. Question
1 pointsWhich of the following is/are the property(ies) of sound?
(a) Loudness (b) Pitch (c) Quality (d) All of these
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Question 52 of 55
52. Question
1 pointsIn which of the following the quality of sound depends?
(a) Amplitude of the vibrations
(b) Frequency of the vibrations
(c) Part of an instrument vibrating to produce the sound
(d) All of these
Correct
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Question 53 of 55
53. Question
1 pointsCorrect
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Question 54 of 55
54. Question
1 pointsWhich of the following is expected to be the best absorber of sound?
(a) Cemented wall (b) Wool (c) Wood (d) Metal
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Question 55 of 55
55. Question
1 pointsChoose the correct option.
Statement 1 : Whales and dolphins use sound to communicate even when they are hundreds of kilometres away from each other.
Statement 2 : Speed of sound is faster in water than in air.
(a) Both statement 1 and statement 2 are true and statement 2 is the correct explanation of statement 1.
(b) Both statement 1 and statement 2 are true but statement 2 is not the correct explanation of statement 1.
(c) Statement 1 is true but statement 2 is false.
(d) Statement 1 is false but statement 2 is true.
Correct
Incorrect