The Current Source node adds a distributed current source
Qj in the equation that the physics interface defines. Use this node with caution as it can violate the current conservation law that is inherent in Maxwell–Ampère’s law.
Add a contribution as a Harmonic Perturbation by right-clicking the parent node or clicking
Harmonic Perturbation in the
Physics toolbar. For more information see
Harmonic Perturbation — Exclusive and Contributing Nodes in the
COMSOL Multiphysics Reference Manual.