Physics - Electrostatics Question with Solution | TestHub

The work done to rotate an electric dipole in a uniform electric field is given by $W=pE(\cos {\theta }_1-\cos {\theta }_2)$. Given $p=2\times 10^{-9}$ C-m, $E=10^3$ N/C, ${\theta }_1=0^{\circ }$, and ${\theta }_2=90^{\circ }$.$W=(2\times 10^{-9})(10^3)(\cos 0^{\circ }-\cos 90^{\circ })=2\times 10^{-6}(1-0)=2\times 10^{-6}$ J. In microjoules, $W=2\mu$ J.