According to Faraday's law, a changing magnetic field induces an electric field. The direction of the induced electric field is such that the extra magnetic field of the current it tends to produce would oppose the change in magnetic field.
We examine how this effect can lead to voltage oscillations at a characteristic frequency in an electric circuit. The circuit is similar to that used in the RC circuit experiment, except that we include an "inductor" (in the form of a large solenoid) in series with the resistance.
Discharge of the capacitor produces a changing current and thereby a changing magnetic field in the solenoid. This induces an electromotive force acting back on the solenoid itself in such a way as to keep the current flowing even after the capacitor is discharged, thereby reversing the charge on the capacitor plates. The process keeps repeating itself with ever decreasing amplitude.
We will observe the oscillatory behavior in such a circuit. Characteristics of the oscillation such as the frequency and damping rate will be measured and compared with the values predicted from known properties of the circuit.