noun
secondary circuit
Technical term in electrical engineering for a circuit that is not the primary one, often referring to the output side of a transformer or a secondary wiring loop.
変圧器の二次回路の電圧を測定する。
Measure the voltage of the transformer's secondary circuit.
Primary circuit, the input or main circuit, as opposed to the secondary circuit.
Compound of 二次 (secondary) + 回路 (circuit). A straightforward technical term.