EASY
9th CBSE
IMPORTANT
Earn 100

Frequency of infrasonic waves > Frequency of ultrasonic waves.

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Important Questions on Sound

MEDIUM
9th CBSE
IMPORTANT
Modern's abc+ Of Science - Physics For Class IX>Chapter 6 - Sound>CHAPTER PRACTICE TEST 1>Q 15
Due to the high power of ultrasound waves, it is used for breaking and cutting objects.
EASY
9th CBSE
IMPORTANT
Modern's abc+ Of Science - Physics For Class IX>Chapter 6 - Sound>CHAPTER PRACTICE TEST 1>Q 16
Frequency×Time period= _____.
EASY
9th CBSE
IMPORTANT
Modern's abc+ Of Science - Physics For Class IX>Chapter 6 - Sound>CHAPTER PRACTICE TEST 1>Q 17

Sound is produced by a _____ body.

(vibrating/reflecting)

EASY
9th CBSE
IMPORTANT
Modern's abc+ Of Science - Physics For Class IX>Chapter 6 - Sound>CHAPTER PRACTICE TEST 1>Q 18
Sound waves cannot travel through _____.
(metal / vacuum)
EASY
9th CBSE
IMPORTANT
Modern's abc+ Of Science - Physics For Class IX>Chapter 6 - Sound>CHAPTER PRACTICE TEST 1>Q 19
The frequency of a source of sound is 20 Hz. Its time period _____ second.
EASY
9th CBSE
IMPORTANT
Modern's abc+ Of Science - Physics For Class IX>Chapter 6 - Sound>CHAPTER PRACTICE TEST 1>Q 20
The multiple reflections of sound in a hall is called _____.
EASY
9th CBSE
IMPORTANT
Modern's abc+ Of Science - Physics For Class IX>Chapter 6 - Sound>CHAPTER PRACTICE TEST 2>Q 1
What does a wave transfer?
EASY
9th CBSE
IMPORTANT
Modern's abc+ Of Science - Physics For Class IX>Chapter 6 - Sound>CHAPTER PRACTICE TEST 2>Q 2
Differentiate between crest and trough.