1.

The equation of a wave travelling in a string can be written as \[y=3\cos \pi (100\,t-x)\]. Its wavelength is [MNR 1985; CPMT 1991; MP PMT 1994, 97; Pb. PET 2004]

A.            100 cm                                    
B.            2 cm
C.            5 cm                                         
D.            None of the above
Answer» C.            5 cm                                         


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