A) \[5\,\,s\]
B) \[6\,\,s\]
C) \[\overset{\to }{\mathop{a}}\,\]
D) \[\overset{\to }{\mathop{b}}\,\]
Correct Answer: B
Solution :
Key Idea: When sound is reflected from the wall, then it is a case when observer (driver) and source (reflected sound) approaching each other. The apparent change in the frequency of source and observer is known as Doppler?s effect. The perceived frequency is \[500\,\,V\] Where, \[l\]is speed of sound, \[M\] is velocity of observer and \[\frac{2}{\pi }\] is frequency of source. \[16\,\,Ml\] Also beats\[4\,\,Ml\].You need to login to perform this action.
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