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9th CBSE
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Sound waves transfer :

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Important Questions on Sound

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9th CBSE
IMPORTANT
All In One SCIENCE CBSE Class IX>Chapter 12 - Sound>CHAPTER EXERCISE>Q 2

In the given curve, half the wavelength is :

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9th CBSE
IMPORTANT
All In One SCIENCE CBSE Class IX>Chapter 12 - Sound>CHAPTER EXERCISE>Q 3
Which wave property determines the loudness of sound?
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9th CBSE
IMPORTANT
All In One SCIENCE CBSE Class IX>Chapter 12 - Sound>CHAPTER EXERCISE>Q 4
Earthquake produces which kind of sound before the main shock wave begins
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9th CBSE
IMPORTANT
All In One SCIENCE CBSE Class IX>Chapter 12 - Sound>CHAPTER EXERCISE>Q 5
In SONAR, we use :
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9th CBSE
IMPORTANT
All In One SCIENCE CBSE Class IX>Chapter 12 - Sound>CHAPTER EXERCISE>Q 6
Assertion: Sound wave is an electromagnetic wave.
Reason: Speed of sound in solid is less than air.
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9th CBSE
IMPORTANT
All In One SCIENCE CBSE Class IX>Chapter 12 - Sound>CHAPTER EXERCISE>Q 7
Assertion: The loudness of sound is measured in decibel.
Reason: If sound waves have a large amplitude then the sound will be loud.
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9th CBSE
IMPORTANT
All In One SCIENCE CBSE Class IX>Chapter 12 - Sound>CHAPTER EXERCISE>Q 8
Assertion: Ultrasonic sound is used in industry for detecting flaws (cracks etc) in metal blocks without damaging them.
Reason: An internal crack (or hole) does not allow ultrasound to pass through it.
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9th CBSE
IMPORTANT
All In One SCIENCE CBSE Class IX>Chapter 12 - Sound>CHAPTER EXERCISE>Q 9
What is the nature of the ocean waves in deep water?