Question

Three charges, each equal to $2\mu C$ , are placed at the corners of an equilateral triangle. If force between any two charges is F, then the net force on either will be

• A. $\sqrt{3}F$
• B. $\sqrt{2}F$
• C. $3F$
• D. $F/3$

Answer 1

The correct option is B $\sqrt{2}F$

As all the three charges have same magnitude they will exert same force on each other. The equivalent force on a charge due to other two charges will be,

$F_{eq}=\sqrt{F^2+F^2+2FF\cos 60}$

$=F\sqrt{2}$