A sound source is releasing a signal of constant frequency 330 Hz. f& are frequency and wavelength observed by an observer. The velocity of sound in air is 330 .
Column-I | Column-II | ||
P | The observer & source move towards each other. | 1 | |
Q | The observer and source are stationary, wind is blowing towards source from observer. | 2 | |
R | The source is stationary, wind is blowing from source to observer and observer is moving away from the source. | 3 | |
S | The source is stationary and observer is moving towards source. | 4 |
P :
Frequency increases and wavelength decreases.
Q :
Frequency remain same and wavelength also remain same.
R :
Frequency decreases and wavelength remain same.
S :
Frequency increases and wavelength remain same.
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A source of sound of frequency 1000 Hz is moving towards a stationary wall with velocity 30 m/s and observer is also moving behind the source with the same velocity. If the frequency band width detected by the observer is K x102 . There find the value of k :
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