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JEE Main Physics Class 11 Waves Part 1 Questions

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Question : 58

Total: 100

A toy–car, blowing its horm, is moving with a steady speed of 5 m/s, away from a wall. An observer, towards whom the toy car is moving, is able to hear 5 beats per second. If the velocity of sound in air is 340 m/s, the frequency of thehorn of the toy car is close to :

[Online April 10, 2016]

680 Hz
510 Hz
340 Hz
170 Hz

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