A) 360
B) 180
C) 60
D) 3
Correct Answer: B
Solution :
[b] Equation of progressive wave is given by \[Y=A\,\sin \,2\pi ft\] Given \[{{Y}_{1}}=4\sin 500\pi t\] and \[{{Y}_{2}}=2\sin 506\pi t\] Comparing the given equations with equation of progressive wave, we get \[2{{f}_{1}}=500\Rightarrow {{f}_{1}}=250\] \[2{{f}_{2}}=506\Rightarrow {{f}_{2}}=253\] Beats\[={{f}_{2}}-{{f}_{1}}=253-250=3\,beats/sec\] \[=3\times 60=180\,beats/\min ute.\]You need to login to perform this action.
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