Likewise Catt s electromagnetism does not pass muster Displacement Current and how to get rid of it throws up quite enough problems Reading it critically reveals that although the article makes assertions about displacement current the only real science is does is to model the voltage at the source end of a transmission line as it is charged through a resistor Since displacement current is the prediction that a changing electric field causes a magnetic field the only way to disprove the concept is to disprove the existence of the effect Catt et al didn t even try to do this It would appear that they think that because they can get to the end of the calculation without introducing displacement current that they can say that it doesn t exist They are in total denial of the fact that their mathematics works because it has the equations that describe a capacitor built into it Catt has quoted Davidson as in effect calling the Telegrapher s Equations absurd because they model a TL as a capacitor when Catt Davidson know that a capacitor is a TL Electromagnetics ch6 Although Catt would undoubtedly claim that the equations describing the TL are based on experiment they are in fact derived from the Telegrapher s Equations in the first place More superficiality