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A transformer may be produced by putting the windings near one another, an arrangement termed an "air-core" transformer. An air-core transformer eliminates loss due to hysteresis within the core material.[12] The magnetizing inductance is drastically lowered by the shortage of a magnetic core, resulting in massive magnetizing currents and losses if used at low frequencies. Air-core transformers are unsuitable to be used in energy distribution,[12] however are frequently employed in radio-frequency purposes.[37] Air cores are additionally used for resonant transform
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