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A musician using and open flute of leng...

A musician using and open flute of length 50 cm produces second harmonic sound waves. A person runs towards the musician from another end of a hall at a speed of 10 km/h. If the wave speed is 330 m/s, the frequency heard by the running person shall be close to :

A

333 Hz

B

753 Hz

C

500 Hz

D

666 Hz

Text Solution

Verified by Experts

The correct Answer is:
D
Open flute `f_(2)`(second harmonic) = `(2 cdot V)/(2l) = (330)/(1//2) = 660 Hz`
`f_("apparent") = (f_2(V+V_0))/V = 600 (1 + (10 xx 5/18)/(300)) = 666 Hz`
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