1.
The density of a medium through which sound propagates is maximum in a region which called a
2.
The density of a medium through which sound propagates is minimum in a region which is called a
3.
When a wave travels in a medium, the quantity that is transferred from one place to the other with the wave is
4.
Mechanical wave can travel
6.
The distance between a crest and the next trough in a periodic wave is
7.
The minimum distance between two crests is called
8.
The period of a periodic wave is 0.02 sec. at a particular position, there is a crest at t=0. A trough appears at this position at t
9.
Sound travels at a speed of 334 m/s in air. This means that
10.
Non mechanical waves can travel
12.
Lightening is seen before thunder is heard because
13.
Pendulum oscillates with frequency of 10 Hz. Its time period is
14.
The decibel is a unit that measured
15.
Women are high pitched because their vocal cords are
16.
Sound travels with maximum speed in
17.
While tightening the membrane of the table, its pitch
18.
Frequency less than20 hertz are known as
19.
For propagation sound needs a
20.
The maximum displacement of a vibrating object from its position of rest is called the
21.
The frequency of ultrasonic sound is
22.
The pitch of a female rather than a man is
23.
A child’s squeaky toy sounds louder in a tub of water than air
24.
Sound can’t travel through vacuum because of
25.
Number of bones are present in the middle ear
26.
If a violin string is pulled strongly its amplitude of vibration increases. Which characteristic of sound produced changed here?
27.
If an object oscillates 30 times in two seconds what would be its time period
28.
The other name of voice box is
29.
The part is vibrating of mridangam is
30.
Sound can’t be produced without
32.
How noise pollution can be reduced in the residential area?
33.
A sound from a mosquito is produces when it vibrates its wings at an average rate of 500 vibrations per second. It is
34.
If amplitude of a vibrating object becomes double how does the loudness of sound change?
35.
When a sound wave goes from air into water, the quantity that remains unchanged is its
36.
Multiple reflection of sound is called
37.
How can we reduce sound in cinema hall?
38.
In human ear sound energy is converted into
39.
The time is taken for a vibration to repeat is called its
40.
Of the following properties of a wave, the one that is independent of the others is its
42.
The wave length of an ultrasonic wave is
43.
The frequency of a man’s voice is 200 Hz and its wave length is 2 m. if the wave length of a child’s voice in 1m, then the frequency of the child’s voice is
44.
The speed of sound waves having a frequency of 256Hz compared with the speed of sound wave having a frequency of 512 Hz is
45.
The wall of a hall built for musical concert should
