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In Dopplers effect, when a source moves ...

In Dopplers effect, when a source moves towards a stationary observer, the apparent increase in frequency is due to

A

increase in wave length of sound received by observer

B

decrease in wave length of sound received by observer

C

increase in number of waves received by observer in one second

D

none of the above, but due to something else

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The correct Answer is:
B
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AAKASH SERIES-WAVES-EXERCISE-IA (Theoretical questions :)
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  12. In Dopplers effect, when a source moves towards a stationary observer,...

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  15. Which of the following is correct

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  17. A radar sends waves towards a distant object and receives the signla r...

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  20. When two waves of nearly equal frequencies superimpose them. The frequ...

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