1.
A mechanical wave requires
2.
Electromagnetic waves can travel through
3.
The speed of sound in air increases with
4.
In a stationary wave, energy is
5.
The number of nodes formed in the fundamental mode of a stretched string is
6.
The distance between two successive antinodes is
7.
The fundamental frequency of an open organ pipe of length L is
8.
The fundamental frequency of a closed organ pipe of length L is
9.
The Doppler effect is observed due to
10.
If the source approaches a stationary observer, the observed frequency
11.
If the source moves away from the observer, the observed frequency
12.
The beat frequency produced by tuning forks of frequencies 500 Hz and 504 Hz is
13.
When frequency remains constant but wavelength decreases, the wave speed
14.
The phase difference between two consecutive nodes is
15.
The phenomenon responsible for hearing sound around corners is
16.
Which wave property remains unchanged when a sound wave enters another medium?
17.
Ultrasonic waves have frequencies
18.
An audible sound has a frequency range of approximately
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