CUET Preparation Today
A dipole of dipole moment $\vec{p}$ is kept along an electric field $\vec{E}$ such that $\vec{E}$ and $\vec{p}$ are in the same direction. Find the work done in rotating the dipole by an angle $\pi$. |
W = 2Ep W = –2Ep W = Ep W = –Ep |
W = 2Ep |
$W=\Delta U=U_2-U_1$ Now $U_2=-(E p \cos \pi)=E p$ $U_1=-\left(E p \cos 0^{\circ}\right)=-E p$ ∴ W = 2Ep. |
