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A source and a listener are in unidirect...

A source and a listener are in unidirection at motion with velocities 30 and 45 km/hour respectively. If both have started to move simultaneously from same place, then apparent frequency heard by the listener will be -

A

always less than true frequency

B

always more than true frequency

C

more than actual frequency

D

less than the actual frequency first and then more

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The correct Answer is:
A
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MOTION-SOUND WAVES-Exercise - 1
  1. Doppler’s displacement doesn’t depend upon -

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  2. Apparent frequency of train A is heard by observer in train B as 3/4 o...

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  3. A source and a listener are in unidirection at motion with velocities ...

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  4. Which of the following property of waves is proved by Doppler’s effect...

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  5. A source of frequency n is moving with a uniform velocity v towards a ...

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  6. If an observer is moving with uniform velocity v to wards a stationary...

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  7. A source of sound crosses a stationary observer which is moving with u...

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  8. If a source of frequency n moving with velocity v crosses a stationary...

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  9. If a source of frequency n crosses a stationary observer with uniform ...

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  10. If an observer moving with velocity v crosses a stationary source of f...

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  11. A source of frequency n and an observer are moving on a straight line ...

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  12. Doppler effect in light differs with Doppler effect for sound, because...

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  13. The velocity of light emitted by a source S observed by an observer O ...

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  14. The width of spectral lines (spreading of spectral line) can be explai...

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  15. A star is receding from earth with a velocity 3 xx 10^(6) m//s . If t...

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  16. Due to the relative motion between a star and the earth, the following...

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  17. The apparent change in the frequency n of the electromagnetic signal, ...

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  18. The intensity ratio of two waves is 1 : 16. The ratio of their amplitu...

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  19. A tuning fork of frequency 250 Hz is vibrating at one end of a tube as...

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  20. Two loudspeakers L1 and L2 driven by a common oscillator and amplifier...

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