A) \[\frac{1}{330}s\]
B) \[2\pi \times 330\,s\]
C) \[{{(2\pi \times 330)}^{-1}}s\]
D) \[\frac{6.284}{330}s\]
Correct Answer: A
Solution :
We have the progressive wave given by \[y=2\,\cos \,6.284(330\,t-x)=2\cos 2\pi (330t-x)\] \[=2\,\cos (2\pi \times 330t-2\pi x).\] \[\omega =2\pi \times 330,\] and time period \[T=\frac{2\pi }{\omega }=\frac{1}{330}s.\]
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