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MHT CET Physics question

PhysicsWavesMHT CET

A bat flies at a steady speed of 4 m/s emitting a sound of Hz. It is flying horizontally towards a vertical wall. The frequency of the reflected sound as detected by the bat will be (Take, velocity of sound in air is 330 m/s)

Answer: (C)

Solution

The wall receives and re-emits it, so the approaching bat hears \dfrac{v + u}{v - u}10^3\dfrac{334}{326}$ ≈ 92.2

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Question ID VK-068667