NEET సాల్వ్డ్ పేపర్ 2017 ప్రశ్న 39

ప్రశ్న: రెండు కార్లు వ్యతిరేక దిశలలో వరుసగా 22 m/s మరియు 16.5 m/s వేగంతో ఒకదాని వైపు ఒకటి వస్తున్నాయి. మొదటి కారు డ్రైవర్ 400 Hz పౌనఃపున్యం గల హార్న్ వాయిస్తాడు. రెండవ కారు డ్రైవర్ వినే పౌనఃపున్యం [ధ్వని వేగం 340 m/s]

ఎంపికలు:

A) 448 Hz

B) 350 Hz

C) 361 Hz

D) 411 Hz

Show Answer

సమాధానం:

సరైన సమాధానం: A

వివరణ:

$ f _{A}=f[ \frac{v+v _0}{v-v _{s}} ] $ $ =400[ \frac{340+16.5}{340-22} ] $ $ f _{A}=448Hz $

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