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True to its name, an Air-core transformer is a type of transformer that uses an air-filled space as the core material, rather than a solid iron core. It works on the principle of electromagnetic induction, which states that a changing magnetic field induces an electrical current in a conductor.
A good teaching aid to make students learn Air core transformers, which are designed to transfer radio-frequency currents, i.e., the currents used for radio transmission; they consist of two or more coils wound around a solid insulating substance or on an insulating coil form.
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