A small source of sound moves on a circle as shown in figure and an observer is sitting at O. Let `v_1,v_2,v_3` be the frequencies heard when the source is at A,B and C respectively.
.

Options

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

Answer

C

Explanation

When source is at
`A: f' = f_(min) = f_(1)`
`B: f' = f_(max) = f_(2)`
`C:f' = f = f_(3)`
`f_(2)gtf_(3)gtf_(1)`