What is the primary function of an AC induction coil?

An AC induction coil is primarily used to generate Eddy currents in a conductive material, which are induced currents created by a changing magnetic field. When an alternating current passes through the coil, it produces a varying magnetic field that penetrates the nearby conductive material. This changing magnetic field induces localized currents (Eddy currents) within the material, leading to various effects such as heating or magnetic inspection. Eddy currents can be utilized in non-destructive testing to assess the electrical conductivity and properties of materials, as well as in applications related to induction heating.

The context of the incorrect options provides insight into their functions. For instance, although some of these devices may relate to electrical currents or heating, they do not specifically embody the primary role of an AC induction coil in relation to its design and purpose in inducing Eddy currents.