A) \[2a\cos \theta \]
B) \[\sqrt{2}a\cos \theta \]
C) \[4a\cos \theta /2\]
D) \[\sqrt{2}a\cos \theta /2\]
Correct Answer: C
Solution :
Resultant amplitude \[{{A}_{R}}=2A\cos \,\left( \frac{\theta }{2} \right)=2\times (2a)\cos \,\left( \frac{\theta }{2} \right)=4a\cos \,\left( \frac{\theta }{2} \right)\]You need to login to perform this action.
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