Three charges \[Q,(+q)\] and \[(+q)\] are placed at the vertices of an – McqOptions

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1.	Three charges \[Q,(+q)\] and \[(+q)\] are placed at the vertices of an equilateral triangle of side l as shown in the figure. If the net electrostatic energy of the system is zero, then Q is equal to [MP PET 2001]
A.	\[\left( -\frac{q}{2} \right)\]
B.	\[(-q)\]
C.	\[(+q)\]
D.	Zero
Answer» B. \[(-q)\]

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