page_title: Bifilar coil
section_title: See also
hierarchical_section_title: Bifilar coil / See also
caption_attribution_description: Maxwell, James Clerk: A Treatise on Electricity and Magnetism.
context_page_description: A bifilar coil is an electromagnetic coil that contains two closely spaced, parallel windings. In engineering, the word bifilar describes wire which is made of two filaments or strands. It is commonly used to denote special types of winding wire for transformers. Wire can be purchased in bifilar form, usually as different colored enameled wire bonded together. For three strands, the term trifilar coil is used.
context_section_description: Ayrton-Perry winding
  Basket winding
  Mirror bifilar electrodynamometer
caption: Electrodynamometer with bifilar winding. A Page from Treatise on Electricity and Magnetism Volume 2.
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