Physics - Electrostatics Question with Solution | TestHub

An electric dipole with dipole moment $=(3\hat{\mathrm{i}}+4\hat{\mathrm{j}})\times 10^{-30}\mathrm{C}-\mathrm{m}$ is placed in an electric field $\overrightarrow{\mathrm{E}}=4000\hat{\mathrm{i}}(\mathrm{N}/\mathrm{C})$. An external agent turns the dipole slowly until its electric dipole moment becomes $(-4\hat{\mathbf{j}}+3\hat{\mathbf{j}})\times 10^{-30}\mathrm{C}-\mathrm{m}$. The work done by the external agent is equal to $\alpha \times 10^{-26}\mathrm{J}$. Find value of $\frac{10\alpha }{7}$.