1.

The equation of a transverse wave is given by                    \[y=100\,\sin \pi (0.04z-2t)\]            where y and z are in cm ant t is in seconds. The frequency of the wave in Hz is                                        [SCRA 1998]

A.            1    
B.            2
C.            25  
D.            100
Answer» B.            2


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