\(\Rightarrow \mathrm{U}_{\mathrm{E}}=\frac{1}{2} \varepsilon_{\mathrm{o}} \mathrm{E}^{2}\)
\(\mathrm{U}_{\mathrm{B}}=\frac{\mathrm{B}^{2}}{2 \mu_{0}}=\frac{\mathrm{E}^{2}}{2 \mu_{0} \mathrm{C}^{2}}=\frac{\mathrm{E}^{2}}{2 \mu_{0}}\left(\mu_{0} \varepsilon_{0}\right)=\mathrm{U}_{\mathrm{E}}\)
(${C}=$ શૂન્યવકાશમાં પ્રકાશની ઝડપ)