11.5.3 Source-Free Equations
The general forms of Maxwell’s equations can sometimes be simplified if the sources do not need to be taken into account.
Under these conditions, the current density J, the charge density ρv, or both are removed from the equations and a much
simpler form of the equations is obtained. This is true in the time-dependent or phasor forms of the equations. The timedependent
and time-harmonic source-free Maxwell’s equations are summarized in Tables 11.7 and 11.8.