A flat insulated capacitor, the plates of which are parallel metal circles of radius r₀, is filled with a substance, excluding the central cylindrical region of radius r. The capacitor is discharged through this substance. The discharge current is I. Determine the dependence of the magnetic field induction inside the capacitor on the distance to the axis of the capacitor. Plot this relationship.
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12 Electromagnetic waves
12.1 Properties, emission and reflection of electromagnetic waves