[[Image:Static1.png|thumb|330px| EM.Ferma's PEC dialog.]]
EM.Ferma offers the following types of material objects for construction of your physical structure(click on each type to learn more about it):
* '''[[Defining_Materials_in_EM.Cube#Perfect_Electric_Conductors_.26_Metal_Traces | Perfect Electric Conductors (PEC)]]''': A perfect electric conductor (PEC) is a material with ε<sub>r</sub> = 1 and σ = ∞.
{{Note| You can define any solid or surface object as a fixed-potential PEC object.}}
{{Note| Excluding surface and curve CAD objects, you can define any solid CAD object as a dielectric or magnetic material object.}}
=== Variety of Source Objects ===