Skip to content
MCQtimes.com
GK
Pakistan Studies
Current Affairs
Islamic Studies
English
MCQtimes.com
Toggle Menu
Sound
Home
/
Physics
/
Sound
- Page 4
Show/Hide Answers
Sound
The characteristic of sound by which we can distinguish between a shrill and a grave sound is known as
quality
intensity
loudness
pitch
Author:
rikazzz
Comment
Sound
If the speed of sound in air is 330 ms
-1
 and the wavelength is 10 cm. The frequency of sound should be
3.9×10
3
 Hz
4.7×10
3
 Hz
3.3×10
3
 Hz
5.3×10
3
 Hz
Author:
rikazzz
Comment
Everyday Science
The barely audible sound is called
1 bel
zero bel
4 bel
2 bel
Author:
rikazzz
Comment
Everyday Science
Sound waves are
Longitudinal
Transverse
Electromagnetic
Only magnetic
Author:
rikazzz
Comment
Sound
The level of noise recommended in most countries is
30-40 dB
95-100 dB
85-90 dB
75-80 dB
Author:
rikazzz
Comment
Everyday Science
The SI unit of intensity of sound is
W m
-2
W m
-1
m
-2
WÂ
-1
Author:
rikazzz
Comment
Sound
A normal human ear can hear a sound only if its frequency lies between
30 Hz to 30,000 Hz
50 Hz to 50,000 Hz
20 Hz to 20,000 Hz
10 Hz to 10,000 Hz
Author:
rikazzz
Comment
Sound
A boy clapped his hands near a cliff and heard the echo 3 s later. If the speed of the sound is 346 ms
-1
, then the distance of the cliff from the boy is
345 m
289 m
519 m
600 m
Author:
rikazzz
Comment
Everyday Science
Main sources of noise pollution are
Transportation equipment only
Heavy machinery only
musical instruments
Transportation equipment and heavy machinery
Author:
rikazzz
Comment
Sound
Astronauts in space communicate with each other by radio links because
Sound waves travel slowly in space
sound waves can’t travel in space
sound waves travel fastly in space
sound waves have low frequency
Author:
rikazzz
Comment
Page navigation
Previous Page
Previous
1
2
3
4
5
6
…
11
Next Page
Next
Go to Page
Light
Dark
GK
Pakistan Studies
Current Affairs
Islamic Studies
English