CUET and UG exam WB JEE Mock Test Series 2025 Physics Waves Beats

A motor-cyclist moving towards a huge cliff with a speed of 18 kmh^-1, blows a horn of source frequency 325 Hz. If the speed of the sound in air is 330 ms^-1, the number of beats heard by him is

1

5

2

4

3

10

4

7

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