set of toroid or cylindric coils with copper wire on a white background

inductor coil electronic component wire isolated electrical white background closeup engineering copper transformer object design set solenoid collection repair electrotechnology choke inductance winding twisted spiral helical magnetic field electromagnet ferrite core toroid cylindric ceramic case packaging store energy power electricity spare device equipment circuit electrotechnical industry technology service science ewaste separation green brown red toroidal cylindrical iron encased ferromagnetic wrapped conductor square induction socket passive group technical supply electrotechnics recycle orange gray coils inductors transformers components core