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JEE Main 2014 Physics question

PhysicsWavesJEE Main 2014

Two factories are sounding their sirens at 800 Hz. A man goes from one factory to other at a speed of 2 m/s. The velocity of sound is 320 m/s. The number of beats heard by the person in one second will be:

Answer: (4)

Solution

Moving away from the first siren, Hz. Moving towards the

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Question ID VK-104449