1.

The displacement y (in cm) produced by a  simple harmonic wave is \[y=\frac{10}{\pi }\sin \left( 2000\pi t-\frac{\pi x}{17} \right)\]. The periodic time and maximum velocity of the particles in the medium will respectively be                                                                      [CPMT 1986]

A.            \[{{10}^{-3}}\]sec and 330 m/sec                                     
B.            \[{{10}^{-4}}\]sec and 20 m/sec
C.            \[{{10}^{-3}}\]sec and 200 m/sec                                     
D.            \[{{10}^{-2}}\]sec and 2000 m/sec
Answer» D.            \[{{10}^{-2}}\]sec and 2000 m/sec


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