JEE Main 2006 Physics question
A whistle producing sound waves of frequencies 9500 Hz and above is approaching a stationary person with speed . The velocity of sound in air is 300 . If the person can hear frequencies upto a maximum of 10, 000 Hz, the maximum value of v upto which he can hear the whistle is
Answer: (4)
Solution
Source approaching: . The lowest frequency 9500 Hz must not exceed 10000
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