What term defines one or more turns of a conductor wound to produce an axial magnetic field?

The term that defines one or more turns of a conductor wound to produce an axial magnetic field is a coil. Coils are fundamental components in electromagnetism, effectively generating magnetic fields when an electric current passes through them. When multiple turns of wire are wound together, the magnetic field produced by each turn combines to create a more substantial overall magnetic field. This property is utilized in various applications such as inductors, transformers, and electromagnets.

In contrast, the other terms refer to different electrical components: a resistor is used to limit current flow, a capacitor stores electrical energy temporarily, and an oscillator generates repetitive signals.