NSO Level 1- Science Olympiad (SOF) Class 8: Questions 865 - 871 of 1076

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Question number: 865

» Sound

Edit
MCQ▾

Question

The number of oscillations per second of a vibrating body to produce a sound audible to human ear should be

Choices

Choice (4) Response

a.

15 times

b.

25 times

c.

10 times

d.

20 times

Question number: 866

» Sound

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MCQ▾

Question

Aquatic animals communicate through

Choices

Choice (4) Response

a.

Sound

b.

Gestures

c.

Movement

d.

Action

Question number: 867

» Sound

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MCQ▾

Question

If the amplitude of a sound is , the loudness of the sound would be

Choices

Choice (4) Response

a.

1 dB

b.

2 dB

c.

6 dB

d.

9 dB

Question number: 868

» Sound

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MCQ▾

Question

The relation between the loudness and amplitude of a sound is

Choices

Choice (4) Response

a.

Loudness is decreased by the twice of amplitude

b.

Loudness is increased by twice the amplitude

c.

Loudness is decreased by the square of amplitude

d.

Loudness is increased by the square of amplitude

Question number: 869

» Sound

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MCQ▾

Question

Which of the following is not a use of sound?

Choices

Choice (4) Response

a.

Take photos of internal organs

b.

Treatment and entertainment

c.

Communication in animals

d.

Detect problems in internal organs in medical science

Question number: 870

» Sound

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MCQ▾

Question

Presence of excessive or unwanted sound in the atmosphere causes

Choices

Choice (4) Response

a.

Air pollution

b.

Sound pollution

c.

Environment pollution

d.

Water pollution

Question number: 871

» Sound

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MCQ▾

Question

Here are the different steps of hearing by human. Arrange them in order

1) Outer ear collects the sound and passes to the ear canal

2) The sound strikes the eardrum and vibrates it

3) The vibrations are amplified and transmitted to the middle ear

4) Cochlea coverts the sound waves to electrical signals

Choices

Choice (4) Response

a.

1,4, 3,2

b.

1,3, 2,4

c.

1,3, 4,2

d.

1,2, 3,4

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