MEDIUM
9th CBSE
IMPORTANT
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What are the conditions to get echo?

Important Questions on Sound

MEDIUM
9th CBSE
IMPORTANT
Modern's abc+ Of Science - Physics For Class IX>Chapter 6 - Sound>HOTS Higher Order Thinking Skill & Brain Twisting>Q 3
Why do we prefer ultrasonic sound over other frequencies like X-rays for medical applications?
EASY
9th CBSE
IMPORTANT
Modern's abc+ Of Science - Physics For Class IX>Chapter 6 - Sound>HOTS Higher Order Thinking Skill & Brain Twisting>Q 4
Why are we able to hear the horn of an approaching car before the car reaches us?
EASY
9th CBSE
IMPORTANT
Modern's abc+ Of Science - Physics For Class IX>Chapter 6 - Sound>HOTS Higher Order Thinking Skill & Brain Twisting>Q 5
Why is flash of lightning from clouds seen much before the thunder, although both occur simultaneously?
MEDIUM
9th CBSE
IMPORTANT
Modern's abc+ Of Science - Physics For Class IX>Chapter 6 - Sound>HOTS Higher Order Thinking Skill & Brain Twisting>Q 6
A human heart, on an average, is found to beat 75 times in a minute. Calculate its frequency.
EASY
9th CBSE
IMPORTANT
Modern's abc+ Of Science - Physics For Class IX>Chapter 6 - Sound>Summative Assessment>Q 1
What is wave motion?
EASY
9th CBSE
IMPORTANT
Modern's abc+ Of Science - Physics For Class IX>Chapter 6 - Sound>Summative Assessment>Q 2
Define time period. How is time period related to frequency?
EASY
9th CBSE
IMPORTANT
Modern's abc+ Of Science - Physics For Class IX>Chapter 6 - Sound>Summative Assessment>Q 3
Define amplitude of a wave.
EASY
9th CBSE
IMPORTANT
Modern's abc+ Of Science - Physics For Class IX>Chapter 6 - Sound>Summative Assessment>Q 4
How is sound produced?