Physics, Electromagnetism, Math, Mathematics, Calculus.
fails once we start considering non-steady currents where the rate of change in ρ is no longer zero. Therefore, there must be some extra term to balance out this extra divergence in J. To do this, we will find another expression for μ₀(∇⋅J) which will yield zero if subtracted from μ₀(∇⋅J): Where in