A siren having a ring of 200 hole makes 132 rev/min. A jet of air is directed on the set of holes. Calculate the frequency and wavelength in air of the note produced (take v = 350m/s)
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Correct Answer: Option A
Explanation:
n = 200, S = 132 rev/min, v = 350m/s\(^2\)
f
=
ns
=
200
×
132
rev
min
×
1min
60s
=
440Hz
Â
λ
=
v
f
=
350
440
=
0.795m
n = 200, S = 132 rev/min, v = 350m/s\(^2\)
f
=
ns
=
200
×
132
rev
min
×
1min
60s
=
440Hz
Â
λ
=
v
f
=
350
440
=
0.795m