A) 7
B) 1
C) 5
D) \[2+\sqrt{3}\]
E) \[2-\sqrt{3}\]
Correct Answer: A
Solution :
Given \[{{y}_{1}}=4\sin \left( 4\pi t+\frac{\pi }{2} \right)\] or \[{{y}_{1}}=4\cos 4\pi t\] and \[{{y}_{2}}=3\cos 4\pi t\] Resultant \[y={{y}_{1}}+{{y}_{2}}\] \[y=4\cos 4\pi t+3\cos 4\pi t\] \[y=7\cos 4\pi t\] \[\therefore \]Resultant amplitude \[a=7\]You need to login to perform this action.
You will be redirected in
3 sec