1.

A wave disturbance in a medium is described by \[y(x,\,t)=0.02\cos \,\left( 50\,\pi t+\frac{\pi }{2} \right)\cos (10\pi x)\], where x and y are in metres and t in seconds                                            [IIT 1995]

A.            A displacement node occurs at x = 0.15 m
B.            An antinode occurs at x = 0.3 m
C.            The wavelength of the wave is 0.2 m
D.            The speed of the wave is 5.0 m/s
Answer» B.            An antinode occurs at x = 0.3 m


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