ʻO ka inductor apo kala he mea hana reactive. Hoʻohana pinepine ʻia nā inductors i nā kaapuni uila. Hoʻokomo ʻia kahi uea ma luna o ka mea hao a i ʻole ka ʻili ea-core he inductor. Ke hele ke au i kahi ʻāpana o ka uea, e hoʻokumu ʻia kekahi kahua electromagnetic a puni ka uea, a e loaʻa i kēia kahua electromagnetic ka hopena i ka uea ma kēia kahua electromagnetic. Kapa mākou i kēia hopena electromagnetic induction. I mea e hoʻoikaika ai i ka induction electromagnetic, e hoʻohuli pinepine ka poʻe i kahi uea insulated i loko o kahi wili me kahi helu o nā huli, a kapa mākou i kēia coil he inductance coil. No ka ʻike maʻalahi, kapa ʻia ka inductance coil he inductor a inductor.