An array of coils, fitted around the head, used in MRI scanning

A coil of wire that offers electrical resistance to the passage of a current.

plural of coil winder

(electrical engineering) An electromagnet, consisting of a coil of wire through which a current flows, used to generate a magnetic field in an electromagnetic machine, typically a rotating machine such as a motor or generator.

(electronics) A coil of wire attached to the apex of the cone of a loudspeaker that provides the motive force to the cone by the reaction of a magnetic field to the current passing through it.

A modified Tesla coil used to produce high voltage arcs and discharges.

A mosquito-repelling incense, usually shaped into a spiral, and typically made from a dried paste of pyrethrum powder.

An electrical device for measuring alternating current (AC) or high-speed current pulses. It consists of a helical coil of wire with the lead from one end returning through the centre of the coil to the other end, so that both terminals are at the same end of the coil. The whole assembly is then wrapped around the straight conductor whose current is to be measured.

Synonym of choking coil

An induction coil used for producing sparks, as in an internal combustion engine. / A self-induction coil used to increase the spark in an electric gas-lighting apparatus.