Q.

An observer is moving towards the stationary source of sound, then

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By Expert Faculty of Sri Chaitanya

Apparent frequency will be less than the real frequency

Apparent frequency will be greater than the real frequency

Apparent frequency will be equal to real frequency

Only the quality of sound will change

answer is 2.

(Detailed Solution Below)

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Detailed Solution

Apparent frequency in this case n'=n(v+v0)v∵v+v0v>1⇒n'n>1 i.e. n'>n

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