MHT CET · Physics · Waves and Sound
An observer moves towards a stationary source of sound with a velocity of one fifth of the velocity of sound. The percentage increase in the apparent frequency is
- A \(5 \%\)
- B \(10 \%\)
- C \(20 \%\)
- D \(25 \%\)
Answer & Solution
Correct Answer
(C) \(20 \%\)
Step-by-step Solution
Detailed explanation
\( f' = f \left( \frac{v + v_o}{v - v_s} \right) \) \( f' = f \left( \frac{v + \frac{v}{5}}{v - 0} \right) = f \left( \frac{\frac{6v}{5}}{v} \right) = \frac{6}{5}f \)
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