1.

A plane longitudinal wave having angular frequency omega = 500 rad /sec is travelling in positive x-direction in a medium of density rho =1 kg/m and bulk modulus 4 xx 10^4 N//m^2 . The loudness at a point in the medium is observed to be 20 dB. Assuming at x = 0 initial phase of the medium particles to be zero, find the equation of the wave

Answer»

`y = 2 xx 10^(-9) SIN (500 t- (5X)/(2) )`
`y = 3 xx 10^(-9)sin (500 t + (5x)/(2))`
`y = 3 xx 10^(-9)sin (500 t + (5x)/(2))`
`y = 2 xx 10^(-9) sin (5000 t - (5x)/(2))`

Answer :A


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