A sound source producing waves of frequency $300 H z$ and wavelength $1 m$ . Observer is stationary, while source is going away with the velocity $30 m / s$ , then apparent frequency heard by the observer is:

270 H z

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273 H z

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383 H z

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300 H z

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Solution

The correct option is B $273 H z$
As we know
$f = \frac{v}{v + 30} f_{0} = \frac{330}{360} \times 300 = 273 H z$

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A sound source producing waves of frequency 300Hz and wavelength 1m. Observer is stationary, while source is going away with the velocity 30m/s, then apparent frequency heard by the observer is:

The correct option is B 273HzAs we know f=vv+30f0=330360×300=273 Hz

A sound source producing waves of frequency $300 H z$ and wavelength $1 m$ . Observer is stationary, while source is going away with the velocity $30 m / s$ , then apparent frequency heard by the observer is:

The correct option is B $273 H z$
As we know
$f = \frac{v}{v + 30} f_{0} = \frac{330}{360} \times 300 = 273 H z$