Except when coupling to a circuit terminal, the current flow variable must be manually coupled back in the electrical circuit to the context of the voltage measurement. This applies also when coupling to a current excited terminal. The name of this current variable follows the convention cirn.termIm_i, where cirn is the tag of the Electrical Circuit interface node and termIm is the tag of the External I-Terminal node. The tags are typically displayed within curly brackets {} in the Model Builder.
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Component Couplings and Coupling Operators in the COMSOL Multiphysics Reference Manual.
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