TS EAMCET · Physics · Waves and Sound
An observer moves towards a stationary source of sound, with a speed of one-fifth of the speed of sound. The apparent increase in the frequency heard by the observer is
- A \(16.67 \%\)
- B \(2 \%\)
- C \(25 \%\)
- D \(20 \%\)
Answer & Solution
Correct Answer
(D) \(20 \%\)
Step-by-step Solution
Detailed explanation
From the Doppler's effect \[ f^{\prime}=f_0\left(\frac{v_0 \pm v_0}{v \pm v_s}\right) \] \(\mathrm{v}_{\mathrm{s}}=\) velocity of source \(\mathrm{v}_0=\) velocity of observer \(\mathrm{y}=\) velocity of sound Here \(\mathrm{v}_{\mathrm{s}}=0\)…
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