The resonant frequency of a circuit comprising an inductor and a capacitor is influenced by the magnetic field only if the inductance of the inductor is affected by that field. For standard inductors, such as coils, the resonant frequency remains unchanged. However, if the inductor incorporates a ferrite core, where permeability varies with the magnetic field, the resonant frequency is indeed affected. This distinction is crucial for understanding circuit behavior in varying magnetic environments.
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