MCQ
A source of sound of frequency $500 Hz$ is moving towards an observer with velocity $30 m/s$. The speed of sound is $330 m/s$. the frequency heard by the observer will be .... $Hz$
- ✓$550$
- B$458.3 $
- C$530$
- D$545.5 $
✓
Answer
Correct option: A.
$550$
a
(a) $n' = n\,\left( {\frac{v}{{v - {v_S}}}} \right) \Rightarrow n' = 500\,\left( {\frac{{330}}{{330 - 30}}} \right) = 550 Hz$.
(a) $n' = n\,\left( {\frac{v}{{v - {v_S}}}} \right) \Rightarrow n' = 500\,\left( {\frac{{330}}{{330 - 30}}} \right) = 550 Hz$.
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