MEDIUM
9th CBSE
IMPORTANT
Earn 100

Define the following terms :
(a) wavelength, (b) amplitude, (c) frequency, (d) time period, (e) wave velocity

Important Questions on Sound

EASY
9th CBSE
IMPORTANT
What do you understand by the term infrasonic vibrations? .
EASY
9th CBSE
IMPORTANT
 What do you understand by the term sonic vibrations? State the range of sonic vibrations for human ear.
EASY
9th CBSE
IMPORTANT
 What do you understand by the term ultrasonic vibrations?
EASY
9th CBSE
IMPORTANT
 Name three animals which can hear ultrasonic vibrations.
EASY
9th CBSE
IMPORTANT
What is Galton’s whistle? What is its use?
EASY
9th CBSE
IMPORTANT
Derive a relationship between time period and frequency.
EASY
9th CBSE
IMPORTANT

 Derive a relationship between wave velocity, wavelength and time period.

EASY
9th CBSE
IMPORTANT
Derive a relationship between wave velocity, wavelength and frequency.