Question

Three charges each of magnitude $q$ are placed at the corners of an equilateral triangle. The electrostatic force on the charge placed at the centre is (each side of triangle is $L$ )

• A. zero
• B. $\frac{1}{4 \pi \varepsilon_{0}} \frac{q^{2}}{L^{2}}$
• C. $\frac{1}{4 \pi \varepsilon_{0}} \frac{3 q^{2}}{L^{2}}$
• D. $\frac{1}{12 \pi \varepsilon_{0}} \frac{q^{2}}{L^{2}}$

Answer 1

Answer: (A)

In the following figure, since $\left|\overrightarrow{F_{A}}\right|=\left|\overrightarrow{F_{B}}\right|=\left|\overrightarrow{F_{C}}\right|$ and they are equally inclined with each other, so their resultant will be zero.