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) [EAMCET (Engg.) 2000]

A source producing sound of frequency 170 Hz is approaching a stationa

1.	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) [EAMCET (Engg.) 2000]
A.	0.1m
B.	0.2m
C.	140 vib/sec
D.	0.5m
Answer» B. 0.2m

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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) [EAMCET (Engg.) 2000]

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