September 26, 2026测试页∇⋅E=ρε0\nabla \cdot \mathbf{E} = \frac{\rho}{\varepsilon_0}∇⋅E=ε0ρ∇⋅B=0\nabla \cdot \mathbf{B} = 0∇⋅B=0∇×E=−∂B∂t\nabla \times \mathbf{E} = -\frac{\partial \mathbf{B}}{\partial t}∇×E=−∂t∂B∇×B=μ0J+μ0ε0∂E∂t\nabla \times \mathbf{B} = \mu_0 \mathbf{J} + \mu_0 \varepsilon_0 \frac{\partial \mathbf{E}}{\partial t}∇×B=μ0J+μ0ε0∂t∂EShare