A) \[5\text{ }{{A}^{2}}\]
B) \[13\text{ }{{A}^{2}}\]
C) \[7\text{ }{{A}^{2}}\]
D) \[19\text{ }{{A}^{2}}\]
Correct Answer: D
Solution :
Here, \[A=\sqrt{A_{1}^{2}+A_{2}^{2}+2{{A}_{1}}{{A}_{2}}\cos \theta }\] \[I=9{{A}^{2}}+4{{A}^{2}}+2\times 3A\times 2A\times \frac{1}{2}\] \[I=19{{A}^{2}}\]You need to login to perform this action.
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