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.
{{Note: | You can define any solid or surface object as a fixed-potential PEC object. }}
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]].
{{Note| You can define any solid object as a dielectric or magnetic material object.}}
=== Volume Charge Sources ===
You can define volume charge sources with a specified charge density in C/m3 m<sup>3</sup> confined to certain region of your project. You use [[EM.Cube]]'s [[Solid Objects|solid objects]] to define volume charge sources. All the charge sources belonging to the same group have the same color and same charge density value. The charge density can be positive or negative. To add a new charge source group to a project, right-click on "Volume Charges" on the Navigation Tree, and select "Insert New Charge Source..." From the Charge Source Dialog, you can change the default purple color of the source group or set the values of the Charge Density.
in EM.Ferma apply a charge (or charge density) to a region defined by any of [[EM.Cube|EM.CUBE]]'s CAD objects.
Adding === Volume Current Sources === You can define volume current sources with a new Charge Source is very similar specified current density in A/m<sup>2</sup> confined to adding certain region of your project. Note that current density is a new material in vectorial quantity and has a magnitude and unit direction vector. You use [[EM.Cube]]'s [[Solid Objects|EM.CUBEsolid objects]]to define volume current sources. Find All the volume current sources belonging to the same group have the same color and same current density magnitude and unit vector. To add a new volume current source group to a project, right-click on "Charge SourceVolume Currents" group label in on the navigation tree Navigation Tree, and select "Insert New Charge Current Source..." A dialog will prompt From the user to decide whether charge for this group will be defined in terms of total charge or charge density. If charge density is chosenVolume Current Source Dialog, you can change the specified charge density will be applied to all CAD objects defined in default brown color of the present Charge Source source group. If total charge is selected, or set the specified total charge will be distributed amongst the total volume values of all objects under the present material groupCurrent Density magnitude and unit direction vector components. The default direction vector is z-directed.
=== Wire Current Sources ===
Current Sources in EM.Ferma apply allows you to define idealized wire current sources. You can use this source type to model filament currents or coils. Wire currents are defined using only line and polyline objects. You also need to define a specified current value I in Amperes and a wire radius r in the project units. The line or polyline object is then approximated as a volume current with a current density of J = I/(πr<sup>2</sup>) flowing along the line or polyline side's direction. All the wire current sources belonging to any number the same group have the same color, same current value and same wire radius. The direction of onethe current can be reversed in wire current sources. To add a new wire current source group to a project, right-dimensional CAD objectsclick on "Wire Currents" on the Navigation Tree, such as Lines, Polylinesand select "Insert New Current Source..." From the Wire Current Source Dialog, you can change the default brown color of the source group or Spiralsset the values of the Current and Wire Radius. For any curve, such as There is also a Parabola check box for "Reverse Current Direction". Note that this will reverse the direction of all the wire currents belonging to the same group. When you draw a line or polyline object under a Circle, wire current group in the user Navigation Tree, you will be prompted notice that direction arrows are placed on the drawn CAD object. You can draw any curve object in the project workspace and convert it to perform a one-time conversion to polyline using [[EM.Cube]]'s Polygonize Tool. {{Note| If you draw [[Curve Objects|curve objects]] under a Polyline just wire current group, they will be permanently converted to polyline objects before running a the simulationengine.}}
Adding a new Current Source is very similar to adding a new Charge Source. Keep in mind only one-dimensional objects can be drawn under this material group.
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