A) 2 cm
B) 5 cm
C) 100 cm
D) none of these
Correct Answer: A
Solution :
\[y=3\cos \pi (100t-x)\] ?(i) Standard equation is \[y=a\cos \pi (\omega t-kx)\] ?(ii) Comparing the equation (i) and (ii), we get \[k=\frac{2\pi }{\lambda }=\pi ,\] hence \[\lambda =2\,cm\]You need to login to perform this action.
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