Martin Luther King's iconic I Have a Dream speech is full of allusions. Let's look at a few: Dr. King's speech (1963) was made 100 years after Lincoln's Emancipation Proclamation (1863) that freed all slaves in rebel territories.
There are a number of commercial packages you can use for such purposes. Comsol multiphysics simulation software is a general purpose physics modelling software package that I belive can deal with electromagnitism. The link to their website is http://www.uk.comsol.com. Ansys is another commercial vendor that provides a electromagnetic physics module. There website is http://www.ansys.com.
ThÃ©veninâs And Norton Equivalent. hÃ©veninâs and Nortonâs equivalent are circuit simplification techniques that focus on terminal behavior. This Theorem says that any circuit with a voltage source and a network of resistors can be transformed into one voltage source and one resistor. ThÃ©venin equivalent circuit represents a general circuit in a form of an independent voltage source Vth with a since resistance Rth.