Q. Three charges each of magnitude $q$ are placed at the corners of an equilateral triangle, the electrostatic force on the charge placed at the center is (each side of triangle is $L$)
A) Zero
B) $\frac{1}{4\pi\varepsilon_{0}}\frac{q^{2}}{L^{2}}$
C) $\frac{1}{4\pi\varepsilon_{0}}\frac{{3q}^{2}}{L^{2}}$
D) $\frac{1}{12\pi\varepsilon_{0}}\frac{q^{2}}{L^{2}}$
Explanation
(a) In the following figure since $\left| \overrightarrow{F_{A}} \right| = \left| \overrightarrow{F_{B}} \right| = |\overrightarrow{F_{C}}|$ and they are equally inclined with each other, so their resultant will be zero
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.