A) \[2\sqrt{3}\,unit\]
B) \[\sqrt{7}\,unit\]
C) 2 unit
D) zero
Correct Answer: B
Solution :
Consider the vector diagram shown below. Now for the difference OA - OB Now magnitude of \[|OA-OB|\]is \[R=\sqrt{O{{A}^{2}}+O{{B}^{2}}+2(OA)\,(OB)\cos 120{}^\circ }\] \[=\sqrt{{{2}^{2}}+{{2}^{2}}+2\times -\frac{1}{2}}=\sqrt{7}\,\text{unit}\]You need to login to perform this action.
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