1.

A wave travelling in the `+ve` x-direction having displacement along y-direction as 1`m`, wavelength `2pi` m and frequency of `1//pi` Hz is represented byA. `y=sin(x-2t)`B. `y=sin(2pi x - 2pi t)`C. `y=sin(10pi x-20 pi t)`D. `y=sin(2pi x+2pi t)`

Answer» Correct Answer - A
`y=a sin (omegat-kx)`
`" "`OR
`y=a sin(kx-omegat)`
`therefore y=sin[x-2t] " "`...(1)
`k=(2pi)/(lambda)=(2pi)/(2pi)`
`omega=2pi.v=2pi.(1)/(pi)=2`
`a=1m`


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