A) \[\frac{1}{2\pi {{\varepsilon }_{0}}}\times \frac{q}{{{r}^{2}}}\]
B) \[\frac{1}{2\pi {{\varepsilon }_{0}}}\times \frac{3q}{{{r}^{2}}}\]
C) \[\frac{1}{2\pi {{\varepsilon }_{0}}}\times \frac{\sqrt{3q}}{{{r}^{2}}}\]
D) zero
Correct Answer: D
Solution :
Electric field due each charge have same magnitude and makes an anige of \[{{120}^{o}}\] with each other resulting their magnitude zero at O.
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