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The Pitch of the whistle of an engine ap...

The Pitch of the whistle of an engine appears to drop to `5/6` th of original value when it passes a stationary observer if the speed of sound in air is 350 m/s then the speed of engine is

A

35 m/s

B

70 m/s

C

105 m/s

D

140 m/s

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The correct Answer is:
B
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TARGET PUBLICATION-WAVE MOTION -MCQ 7.1
  1. The Pitch of the whistle of an engine appears to drop to 5/6 th of ori...

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  2. A travelling wave passes a point of observation. At this point, the ti...

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  3. When a wave travels in a medium displacement of a particle is given by...

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  4. A wave is represented by the equation y = A sin(10pix + 15pit + (pi)...

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  5. A transverse wave of amplitude 0.5 m and wavelength 1 m and frequency ...

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  6. The equation of a wave is y=4 sin[(pi)/(2)(2t+(1)/(8)x)] where y ...

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  7. The equation of a wave is y =4 sin {(pi)/(2) (2t +(x)/(8))} ,where y,x...

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  8. The equation of a wave of amplitude 0.02 m and period 0.04 s travellin...

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  9. The path difference between the two waves y(1)=a(1) sin(omega t-(2pi...

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  10. The equation of a transverse travelling on a rope is given by y=10sinp...

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  11. A wave motion has the function y=a0sin(omegat-kx). The graph in figure...

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  12. The eqyation of wave is x= 5sin ((t)/( 0.4) -( x)/(4))cm the maximum...

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  13. The equation of sound wave travelling along negative X-direction is gi...

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  14. A progressive wave is represented by the equation y= 0.5 sin ( 314t- ...

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  15. A wave of frequency 400 Hz has a phase velocity of 300 m/s The phase d...

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  16. A prograssive wave of frequency 500 Hz is travelling with a speed of 3...

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  17. If the speed of the wave shown in the figure is 330m//s in the given m...

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  18. The equation of a wave is y=A sin (2pint) When it is reflected at a f...

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  19. A bat flying above lake emits ultrasonic sound of 100 kHz ,When this w...

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  20. Two waves are represented by y(1)= a sin (omega t + ( pi)/(6)) and y(...

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  21. Two waves represented by the following equations are travelling in the...

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