SaraNextGen Study App [2022-23]
Last Updated On 23-10-2022 - By Sara

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

a.

753 Hz

b.

500 Hz

 

333 Hz

d.

666 Hz


Question ID - 50119 :-

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

a.

753 Hz

b.

500 Hz

 

333 Hz

d.

666 Hz

1 Answer
5876 Votes
3537

Answer Key : (d) -

Frequency of the sound produced by flute,

f = 2  Hz

Velocity of observer, v0 = 10×

∴ Frequency detected by observer, f =  

∴ f=

= 335.56×2 = 671.12

∴ closer answer is (d)



Next Question :

An equilateral triangle is described on the diagonal of a square. What is the ratio of the area of the triangle to that of the square?

(a)

2:

(b)

4:

(c)

:2

(d)

:4


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