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A source S emitting sound of frequency 3...

A source S emitting sound of frequency `300Hz` is fixed on block A which is attached to the free end of a spring `S_(A)` as shown in figure. The detector D fixed on block B attached to free end of spring `S_(B)` detects this sound. The blocks A and B are simultaneously displaced towards each other through a distance of `1.0m` and then left to vibrate. The maximum and minimum frequencies of sound detected by D, if the vibrational frequency of each block is `2Hz` are (Velocity of sound `v=340m//s`)

A

`378.6Hz`, `223Hz`

B

`323Hz`, `278.6Hz`

C

`178Hz`, `276Hz`

D

`420Hz`, `220Hz`

Text Solution

Verified by Experts

The correct Answer is:
B
`n=300Hz`, `V_(S)=V_(D)=Aomega`
`n_(max)=n((V+V_(0))/(V-V_(S)))`, `n_(min=n((V-V_(0))/(V+V_(S)))`
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