A) 2I
B) 4I
C) 5I
D) 7I
Correct Answer: B
Solution :
At point A, resultant intensity \[{{I}_{A}}={{I}_{1}}+{{I}_{2}}=5I;\]and at point B \[{{I}_{B}}={{I}_{1}}+{{I}_{2}}+2\sqrt{{{I}_{1}}{{I}_{2}}}\cos \pi =5I+4I\] \[{{I}_{B}}=9I\] so \[{{I}_{B}}-{{I}_{A}}=4I.\]You need to login to perform this action.
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