In November 1781, John Hanson became the first President of the United States in Congress Assembled, under the Articles of Confederation. Many people have argued that John Hanson, and not George Washington, was the first President of the United States, but this is not quite true.
Even and odd mode impedances of a coupled microstrip line. actually I find the reason when you use differential port, the impedance you get is twice the odd mode impedance, whereas if you use common port, the impedance is half the even mode impedance. 1 members found this post helpful.
Thermovision of the LV turrets of an ABB 500 MVA single-phase GSU transformer (left), and the corresponding temperature distribution calculated by ABB (right). Generator step-up and system intertie power transformers 3 System intertie transformers are key elements in power networks, connecting AC networks of different voltage to each other. These power transformers must be built to withstand severe electrical stress from fault currents and transients. While seldom fully loaded,