question_answer

ABC is an equilateral triangle. Charges \[+\,q\] are placed at each corner. The electric intensity at \[O\] will be                                                                                                                                  [CPMT 1985; AIEEE 2002]

A)                    \[\frac{1}{4\pi {{\varepsilon }_{0}}}\frac{q}{{{r}^{2}}}\]

B)                    \[\frac{1}{4\pi {{\varepsilon }_{0}}}\frac{q}{r}\]

C)                    Zero

D)                    \[\frac{1}{4\pi {{\varepsilon }_{0}}}\frac{3q}{{{r}^{2}}}\]

Correct Answer: C

Solution :