defence exam Navy SSR (Medical) Mock Test Series 2025 Physics Waves Doppler effect

A source and the observer both are moving towards each other with speed v/10, where v is the speed of sound. If the frequency of the sound emitted by the source is f, then the apparent frequency heard by the observer is,

1

1.22f

2

0.82f

3

f

4

1.11f

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