1.

A source of sound of frequency n is moving towards a stationary observer with a speed S. If the speed of sound in air is V and the frequency heard by the observer is \[{{n}_{1}}\], the value of \[{{n}_{1}}/n\] is                                         [MP PMT 1997]

A.            \[(V+S)/V\]                          
B.            \[V/(V+S)\]
C.            \[(V-S)/V\]                           
D.            \[V/(V-S)\]
Answer» E.


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