What enables one to distinguish the sound of two musical instruments even if they are of the same pitch and same loudness.
Noise
Quality
Pitch
None of these
A long flexible spring is called
spring balance
slinky
beam balance
none of these
Vibrations, whose amplitude of oscillations decreases with time are called
free vibrations
forced vibrations
damped vibrations
Which of the following frequency of sound can't be heard by human beings?
5 Hz
20 Hz
400 Hz
1000 Hz
The product of the time period of a wave and its frequency is
infinite
more than unity but less than infinity
zero
unity
The minimum distance between the source and the reflector in air, so that an echo is heard, is approximately equal to
10 m
17 m
34 m
50 m
In which of the following medium will sound travel the fastest?
solid
liquid
both solid and liquid
gas
If a wave of time period T travels with avelocity V, then the wavelength is given by
V T
A boy stands 60 m in front of a tall wall and claps. The boy continues to clap every time an echo is heard. Another boy finds that the time taken between the first and fifty first clap is 18 s. Calculate the speed of sound.
33.3 ms-1
333 ms-1
3.33 ms-1
3330 ms-1
A periodic wave is characterized by
phase only
wavelength only
frequency only
all the above
