Physics - Elecrostatics Question with Solution | TestHub

$\left|{\overrightarrow{P}}_1\right|=q\mathcal{l}$

$\left|{\overrightarrow{P}}_2\right|=q\mathcal{l}$



Angle between them${60}^{\mathrm{o}}$

$\therefore$Resultant dipole moment$P=\sqrt{{\left(ql\right)}^2+{\left(ql\right)}^2+2{\left(ql\right)}^2\cos {60}^{\mathrm{o}}}$

$=\sqrt{3}$$\text{ql}$

As$\left|{\overrightarrow{P}}_1\right|=\left|{\overrightarrow{P}}_2\right|$direction of resultant is along negative y axis thus option is$-\sqrt{3}ql\widehat{j}$