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Source and Listener Moving in Different Lines

A vehicle, wi...

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A vehicle, with a horn of frequency n is moving with a velocity of 30 m/s in a direction perpendicular to the straight line joining the observer and the vehicle. The observer perceives the sound to have a frequency n + n1. Then : (Take velocity of sound in air 330 m/s) : (1) n1 = 10 n (2) n1 = –n (3) n1 = 0 (4) n1 = 2n

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Q. A vehicle, with a horn of frequency n, is moving with a velocity of 30 m/s in a direction perpendicular to the straight line joining the observer and the vehicle. The observer perceives the sound to have a frequency n + n₁. Then n₁ is equal to (take velocity of sound in air as 330 m/s)

A source of sound which is emitting a sound of frequency 600 Hz is moving towards a wall with a velocity of 30 m/s. Three observes A, B, C are taken into consideration. A and B are moving with velocity 20 m/s, 'A' away from the wall and 'B' towards the wall. Here, C is inside the source. Velocity of sound in air is 330 m/s. Then,

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