What term describes turns of electric wire wound around an object, such as an iron core?

The term that accurately describes turns of electric wire wound around an object, such as an iron core, is "coil." In electrical engineering, a coil typically refers to a series of loops formed by winding wire around a core material. This configuration is essential for creating electromagnetic fields and is commonly used in inductors, transformers, and electromagnets.

Coils can enhance the magnetic field produced when electric current flows through the wire, particularly when wound around ferromagnetic materials like iron. This is essential for many applications in electronics and electrical systems, where magnetic fields are harnessed for inductance and energy storage.

The other terms, while related to wire and shapes, do not convey the same specific meaning as "coil." A spiral refers to a shape that winds in a continuous curve, while a loop indicates a single turn of wire rather than a series of turns. The term "magnet" is quite different and pertains to a material or object that produces a magnetic field rather than the structure of the wire itself.