A coil wound on a nonmagnetic core material such as wood or plastic is referred to as a(n) ____ inductor.

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An air core inductor is a coil that is wound on a nonmagnetic core material such as wood or plastic. It is called an air core because the core material is air, which has very low magnetic permeability. This type of inductor is used in applications where a high Q factor is required, such as in high-frequency circuits, because it has low core losses and high self-resonant frequency. The other options, such as a donut, open, or insulated inductor, refer to different types of inductors that are not wound on a nonmagnetic core material.

A Coil Wound on a Nonmagnetic Core Material Such as Wood