$\begin{array}{}\text{The fundamentals of electrodynamics are based on Maxwell Equations}\\ \nabla \cdot \stackrel{}{B}=0\\ \nabla \cdot \stackrel{}{E}=\frac{}{{}_0}\\ \nabla \times \stackrel{}{E}=-\frac{\partial \stackrel{}{B}}{\partial t}\\ \nabla \times \stackrel{}{B}={}_{0}j\frac{1}{c^2}\frac{\partial \stackrel{}{E}}{\partial t}\\ \text{As an alternative to the differentiated form of the Maxwell equations represented,}\\ \text{an integral form may be given:}\\ \underset{V}{∯}\stackrel{}{E}\cdot d\stackrel{}{A}=\frac{1}{{}_0}\underset{V}{\int }\mathrm{dV}\\ \underset{V}{∯}\stackrel{}{B}\cdot d\stackrel{}{A}=0\\ \underset{F}{\oint }\stackrel{}{E}\cdot d\stackrel{}{s}=-\frac{d}{\mathrm{dt}}\underset{F}{\int }\stackrel{}{B}\cdot d\stackrel{}{A}\\ \underset{F}{\oint }\stackrel{}{B}\cdot d\stackrel{}{s}={}_0\underset{F}{\int }\stackrel{}{j}{}_0\frac{\partial \stackrel{}{E}}{\partial t}\cdot d\stackrel{}{A}\end{array}$