Question

Three charges each of magnitude $q$ are placed at the vertices of an equilateral triangle having side $l$. The electrostatic force on an identical charge placed at the centroid of the triangle is

• A. Zero
• B. $\frac{1}{4\pi {ϵ}_o}\frac{q^2}{l^2}$
• C. $\frac{1}{4\pi {ϵ}_o}\frac{3q^2}{l^2}$
• D. $\frac{1}{12\pi {ϵ}_o}\frac{q^2}{l^2}$

Answer 1

The correct option is A Zero

The magnitude of forces are equal to each other and they are equally inclined with each other. Therefore, there resultant will be zero.