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AP EAMCET2007PhysicsWaves and Sound

A whistle of frequency 540 ~Hz rotates in a horizontal circle of radius 2 ~m at an angular speed of 15 rad / s . The highest frequency heard by a listener at rest with respect to the centre of circle (velocity of sound in air =330 ~ms ⁻¹ )

Options

  1. A590 ~Hz
  2. B594 ~Hz
  3. C598 ~Hz
  4. D602 ~Hz

Correct answer

B. 594 ~Hz

Step-by-step solution

Velocity of source v_s=r =2 15=30 ~m / s The highest frequency heard by the stationary listener aligned f^ & =f ( v v-v_s ) f^ & =540 ( 330 330-30 )=594 ~Hz aligned

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