To add a new Fixed-Potential PEC group to a project, right-click on "Fixed-Potential PEC Objects" on the Navigation Tree, and select "Insert New PEC..." From the PEC dialog, you can change the default red color and set a value for the "Voltage" in Volts.
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Note: You can define any solid or surface object as a fixed-potential PEC object.
=== Dielectric/Magnetic Materials ===
In electromagnetic analysis, a general dielectric material is represented by four constitutive material [[parameters]]: relative permittivity ε<sub>r</sub>, relative permeability μ<sub>r</sub>, electric conductivity σ and magnetic conductivity σ<sub>m</sub>. In EM.Ferma, you can define dielectric materials for electrostatic analysis and magnetic (permeable) materials for magnetostatic analysis from the same section of the Navigation Tree titled "Dielectric/Magnetic Materials". For a dielectric material, you specify the relative permittivity ε<sub>r</sub> and electric conductivity σ. For a magnetic material, you specify the relative perambility permeability μ<sub>r</sub>.
To add a new dielectric or magnetic material group to a project, right-click on "Dielectric/Magnetic Materials" on the Navigation Tree, and select "Insert New Dielectric..." From the Dielectric Dialog, you can change the default green color of a material group or set the values of the material [[parameters]].
=== Volume Charge Sources ===
Charge Sources You can define volume charge sources with a charge density in C/m3 Â in EM.Ferma apply a charge (or charge density) to a region defined by any of [[EM.Cube|EM.CUBE]]'s CAD objects.
Adding a new Charge Source is very similar to adding a new material in [[EM.Cube|EM.CUBE]]. Find the "Charge Source" group label in the navigation tree and select "Insert New Charge Source..." A dialog will prompt the user to decide whether charge for this group will be defined in terms of total charge or charge density. If charge density is chosen, the specified charge density will be applied to all CAD objects defined in the present Charge Source group. If total charge is selected, the specified total charge will be distributed amongst the total volume of all objects under the present material group.
 === Wire Current Sources ===
Current Sources in EM.Ferma apply a specified current to any number of one-dimensional CAD objects, such as Lines, Polylines, or Spirals. For any curve, such as a Parabola or a Circle, the user will be prompted to perform a one-time conversion to a Polyline just before running a simulation.