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CBSE Class 8 Physics Sound and Properties (Hard)
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Question 1 of 10
1. Question
The hearing range of human ear is
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Question 2 of 10
2. Question
The frequency of subsonic sound is
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Question 3 of 10
3. Question
1 hertz is equal to
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Question 4 of 10
4. Question
Speed is
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Question 5 of 10
5. Question
A pendulum oscillates 20 times in 4 seconds. Find its time period.
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Question 6 of 10
6. Question
The velocity of sound at 20°C is approximately
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Question 7 of 10
7. Question
Voice of man is heavy compared to a woman because
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Question 8 of 10
8. Question
In order to reduce the loudness of a sound we have to
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Question 9 of 10
9. Question
A list of mediums is given below.
- (i) wood
- (ii) water
- (iii) air
- (iv) vacuum
In which of these mediums can sound travel?
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Question 10 of 10
10. Question
Which of the following statements are correct?
(i) Sound is produced by vibrations.
(ii) Sound requires a medium for propagation.
(iii) Light and sound both require a medium for propagation.
(iv) Sound travels slower than light.Correct
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