Electronics and Communication Engineering - Electronic Devices and Circuits - Discussion

Hi Guys, how iron core can become an inductor, how its provided by air gap can you guys give me an explanation about this?

When AC signals are applied, this nonlinearity can cause the generation of harmonics and intermodulation distortion. To prevent this, the level of signals applied to iron core inductors must be limited so they don't saturate. To lower its effects, an air gap is created in some kinds of transformer cores.