A) 3 cm
B) 6 cm
C) 8 cm
D) 5 cm
Correct Answer: B
Solution :
The equation of stationary wave is \[y=2a\,\cos \frac{2\pi x}{\lambda }\sin \frac{2\pi t}{T}\] Given, a = 8 cm, n = 30 Hz, v = 180 cm/s \[T=\frac{1}{n}=\frac{1}{30}s\], \[\therefore \] \[\lambda =vT=180\times \frac{1}{30}=6\,\,cm\]You need to login to perform this action.
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