A small source of sound moves on a circle as shown in the figure and an observer is standing on O. Let `n_1`,`n_2` and `n_3` be the frequencies heard when the source is at A, B and C respectively. Then

Options

A. `V_(1) gt V_(2) gt V_(3)`
B. `V_(1)=V_(2)gtV_(3)`
C. `V_(2) gt V_(3) gt V_(1)`
D. `V_(1) gt V_(3) gt V_(2)`

Answer

C

Explanation

Source has velocity towards the observer at B, away from observer at A and perpendicular to the line joining source and observer at C.
`therefore V_(2) gt V_(3) gt V_(1)" "therefore V_(3)=V_(0)`