NSO Level 1- Science Olympiad (SOF) Class 8: Questions 860 - 867 of 1175

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Question 860

Question

MCQ▾

The size of vocal cord of a common man is

Choices

Choice (4)Response

a.

b.

c.

d.

Question 861

Question

MCQ▾

An unpleasant sound which disturbs us is called a

Choices

Choice (4)Response

a.

Music

b.

Alarm

c.

Noise

d.

Question does not provide sufficient data or is vague

Question 862

Question

MCQ▾

Children under the age of can hear sounds with frequency up to

Choices

Choice (4)Response

a.

25 KHz

b.

20000 Hz

c.

20Hz

d.

20 KHz

Question 863

Question

MCQ▾

Sound is a form of

Choices

Choice (4)Response

a.

Work

b.

Energy

c.

Force

d.

Question does not provide sufficient data or is vague

Question 864

Question

MCQ▾

In sonography or ultra sound scanning, the sound used is with frequency

Choices

Choice (4)Response

a.

Above 20000Hz

b.

Below 20 Hz

c.

20Hz to 20000Hz

d.

Question does not provide sufficient data or is vague

Question 865

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

a.

15 times

b.

25 times

c.

10 times

d.

20 times

Question 866

Question

MCQ▾

Aquatic animals communicate through

Choices

Choice (4)Response

a.

Sound

b.

Gestures

c.

Movement

d.

Action

Question 867

Question

MCQ▾

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

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