Question

Three equal charges, $2.0\times {10}^{-6}C$ Each are held fixed at the three corners of an equilateral triangle of side 5 cm. Find the coulomb forc eexperiencd by one of the charges due to the rest two

Answer 1

$F=F_{BA}\cos \theta +F_{CA}\cos \theta \text{But}{F}_{BA}=F_{CA}F=2F_{BA}\cos \theta ,\theta ={30}^{\circ }=\frac{2\times 9\times {10}^9(2\times {10}^{-6})\times \frac{\sqrt{3}}{2}}{(0.05{)}^2}$

= 24.9 N