=== Voltage Sources ===
In EM.Ferma, Voltage Sources are applied to a specified PEC material group that exists under Physical Structure in EM.CUBE's navigation tree. All CAD objects under the specified PEC group will act as Voltage Sources.
To add a new Voltage Source to a project, right-click on "Voltage Sources " on the navigation tree, and select "Insert Voltage Source...". In the Voltage Source dialog, select the PEC group to which the specified voltage will be applied. Enter any string as the Voltage -- a text string will be interpreted as a variable which can be used for parametric design, or a parameter sweep.
=== Charge Sources ===