The phase difference between two vibrating particles separated by a distance of 11 M into medium through which a progressive wave is travelling is `1320^0` If the frequency of the disturbance is 105 Hz, the phase velocity of the progressive wave in `ms^-1`.

Options

A. 315
B. 330
C. 350
D. 300

Answer

A

Explanation

Phase velocity `v=nlambda`
`/_\phi=1320^0=1320xxpi/180=22/3pi`
`/_\x=11,n=105Hz`
`implies/_\phi=(2pi)/lambda/_\x`
`22/3pi=(2pi)/lambdaxx11`
`lambda=(2pixx11xx3)/(22pi)=3m`
`:. v=nlambda=105xx3=315ms^-1`