A) \[15\sqrt{2}m{{s}^{-1}}\]
B) \[15/\sqrt{2}m{{s}^{-1}}\]
C) \[15m{{s}^{-1}}\]
D) \[30\,m{{s}^{-1}}\]
Correct Answer: C
Solution :
[c] Velocity of sound in air = 300 m/s. |
If a source of sound is moving towards a stationary listener, the frequency heard by the listener would be different from the actual frequency of the source, this apparent frequency is given by |
where symbols have their usual meanings. |
In the denominator +ve sign would be taken when source is receding away from the listener, while ve sign would be taken when source is approaching the listener. |
Let v be the maximum value of source velocity for which the person is able to hear the sound, then |
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