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A train is moving on a straight track wi...

A train is moving on a straight track with speed `20 ms^(-1)` . It is blowing its whistle at the frequency of 1000 Hz. The percentage change in the frequency heard by a person standing near the track as the train passes him is (speed of sound = `320 ms^(-1)`) close to

A

0.06

B

0.12

C

0.18

D

0.24

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TARGET PUBLICATION-Sound-Exercise
  1. The observer is moving with velocity 'v0' towards the stationary sourc...

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  2. A source of sound S is moving with a velocity 50 m//s towards a statio...

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  3. A train is moving on a straight track with speed 20 ms^(-1) . It is bl...

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  4. The pitch of the whistle of an engine appears to drop to (frac(5)(6)^(...

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  5. A motor car blowing a horn of frequency 124 vib//s moves with a veloci...

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  6. A train is moving with a uniform speed of 33 m//s and an observer is a...

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  7. Two cars moving in opposite directions approach each other with speed ...

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  8. A siren emitting a sound of frequency 800 Hz moves away from an observ...

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  9. A car with a hom of frequency 620 Hz travels towards a large wall with...

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  10. A police car with a siren of frequency 8 kHz is moving with uniform ve...

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  11. A source of sound S is moving with a velocity 50 m//s towards a statio...

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  12. A railway engine whistling at a constant frequency moves with a consta...

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  13. A source of sound S emitting waves of frequency 100 Hz and an observer...

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  14. A drone fitted with siren in flying directly away from the drone opera...

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  15. A siren placed at a railway platform is emitting a sound of frequency ...

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  16. Two trains A and B are approaching a platform from opposite direction...

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  17. A train has just completed a U-curve in a track which is a semicircle....

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  18. A car is moving with a speed of 72 km-hour^(-1) towards a roadside sou...

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  19. The velocity of sound is greatest in

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  20. A heavy ball of mass M is suspended from the ceiling of a car by a lig...

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