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Standard IX
Physics
Speed of Sound
Question
Frequency of a sound wave if it travels with a speed of 330 ms
−
1
in air and the wavelength of the wave is 330 cm is :
150 Hz
none of the above
200 Hz
100 Hz
A
100 Hz
B
200 Hz
C
150 Hz
D
none of the above
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Solution
Verified by Toppr
We have , a relation in frequency
f
and wavelength
λ
of a wave having the velocity
v
as ,
v
=
f
λ
,
or
f
=
v
/
λ
Given
v
=
330
m
/
s
,
λ
=
330
c
m
=
3.3
m
,
Therefore velocity of wave,
f
=
330
/
3.3
=
100
H
z
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