1.

           If the speed of the wave shown in the figure is 330m/s in the given medium, then the equation of the wave propagating in the positive x-direction will be (all quantities are in M.K.S. units)                                      

A.            \[y=0.05\sin 2\pi (4000\,t-12.5\,x)\]
B.            \[y=0.05\sin 2\pi (4000\,t-122.5\,x)\]
C.            \[y=0.05\sin 2\pi (3300\,t-10\,x)\]
D.            \[y=0.05\sin 2\pi (3300\,x-10\,t)\]
Answer» D.            \[y=0.05\sin 2\pi (3300\,x-10\,t)\]


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