MEDIUM
9th CBSE
IMPORTANT
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How does a sound wave propagate?

Important Questions on Sound

MEDIUM
9th CBSE
IMPORTANT

What are the crests and troughs in a transverse wave? How is a transverse wave described graphically?

MEDIUM
9th CBSE
IMPORTANT

Derive mathematical equation describing the relationship between wave velocity, wavelength and frequency.

MEDIUM
9th CBSE
IMPORTANT

What is an echo? How is it produced? What should be the minimum distance(in air, at 20C)between the observer and the obstacle for an echo to be heard clearly?(The speed of sound at 20 C=343 m/s)

MEDIUM
9th CBSE
IMPORTANT
What is ultrasound? Name three applications of ultrasound.
EASY
9th CBSE
IMPORTANT
During a wave motion, energy is transferred from one point to another.
EASY
9th CBSE
IMPORTANT
In any medium, the speed of electromagnetic waves is lesser than that of sound waves.
EASY
9th CBSE
IMPORTANT
Sound travels faster than light.
EASY
9th CBSE
IMPORTANT
Amplitude of a wave is a measure of its energy.