Sound [NSO Level 1- Science Olympiad (SOF) Class 8]: Questions 7 - 12 of 74
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Question 7
Question MCQ▾
The number of oscillations per second of a vibrating body to produce a sound audible to human ear should be
Choices
Choice (4) | Response |
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a. | 15 times |
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b. | 25 times |
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c. | 10 times |
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d. | 20 times |
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EditQuestion 8
Question MCQ▾
Aquatic animals communicate through
Choices
Choice (4) | Response |
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a. | Sound |
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b. | Gestures |
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c. | Movement |
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d. | Action |
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EditQuestion 9
Question MCQ▾
If the amplitude of a sound is , the loudness of the sound would be
Choices
Choice (4) | Response |
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a. | 1 dB |
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b. | 2 dB |
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c. | 6 dB |
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d. | 9 dB |
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EditQuestion 10
Question MCQ▾
The relation between the loudness and amplitude of a sound is
Choices
Choice (4) | Response |
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a. | Loudness is decreased by the twice of amplitude |
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b. | Loudness is increased by twice the amplitude |
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c. | Loudness is decreased by the square of amplitude |
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d. | Loudness is increased by the square of amplitude |
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EditQuestion 11
Question MCQ▾
Which of the following is not a use of sound?
Choices
Choice (4) | Response |
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a. | Take photos of internal organs |
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b. | Treatment and entertainment |
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c. | Communication in animals |
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d. | Detect problems in internal organs in medical science |
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EditQuestion 12
Question MCQ▾
Presence of excessive or unwanted sound in the atmosphere causes
Choices
Choice (4) | Response |
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a. | Air pollution |
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b. | Sound pollution |
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c. | Environment pollution |
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d. | Water pollution |
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