A circular platform, 5.0 m in radius, has a pair of 600 Hz …

Physics Wave and Sound Mix Numeric Response

Published on: September 12, 2026

A circular platform, 5.0 m in radius, has a pair of 600 Hz sirens, mounted on posts at opposite ends of a diameter. The platform rotates with an angular velocity of 0.80 rad/s. A stationary listener is located at a large distance from the platform. The speed of sound is 350 m/sec.

(i) In situation the longest wavelength reaching the listener from the sirens, in cm, is closest to –

58.3 605 599 Hz

59.6 607 585.6 Hz

59.0 611 607 Hz

57.7 (ii) In situation, the highest siren frequency heard by the listener in S.I. units, is closest to – 609 (iii) In situation, the listener mounts a bicycle and rides directly away from the carousel with a speed of 4.5 m/sec. The highest siren frequency heard by the listener, in SI units, is given by– 614 Hz

Text Solution

Verified by Experts

The correct answer is:

345.5

(i)

Sol. Longest wavelength

λ max = = = 0.59 m

(ii)

Sol. f max =

= = 607 Hz

(iii)

Sol. 345.5/346.0 × 600 = 599 Hz

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