NEET Physics Waves Questions Solved

A source producing sound of frequency 170 Hz is approaching a stationary observer with a velocity 17 ms–1. The apparent change in the wavelength of sound heard by the observer is (speed of sound in air = 340 ms–1

(1) 0.1m

(2) 0.2m

(3) 0.4m

(4) 0.5m

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