Home Physics Wave and Sound NCERT An ambulance blowing a siren of frequency 70…
Physics Wave and Sound NCERT MCQ (Single Correct)

An ambulance blowing a siren of frequency 700 Hz is travelling slowly towards a vertical reflecting wall with a speed of . The speed of sound is . How many beats are heard by the driver per second?

A
4
B
6
C
8
D
10

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The correct answer is:
C

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