closeup of toroidal inductor and transformer on a white background

inductor transformer toroidal coil electronic component isolated wire white background closeup electrical engineering copper yellow industry design two objects electrotechnics reactor induction winding spiral wrapped ferromagnetic magnetic electromagnetic core field voltage electric conductor ring circle shape power energy device passive network electrotechnology technology tech repair supply science replace recycle orange panoramic green toroid electromagnet choke pin material twisted inductance ferrite round circuit element electricity electronics replacement service spare store ewaste black detail coils components core