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View (C) shows the capacitor discharged and a maximum magnetic field around the coil. The energy
originally stored in the capacitor is now stored entirely in the magnetic field of the coil.
Figure 1-8C.—Capacitor and inductor action in a tank circuit.
Since the capacitor is now completely discharged, the magnetic field surrounding the coil starts to
collapse. This induces a voltage in the coil which causes the current to continue flowing in the same
direction and charges the capacitor again. This time the capacitor charges to the opposite polarity, view
(D).
Figure 1-8D.—Capacitor and inductor action in a tank circuit.
In view (E), the magnetic field has completely collapsed, and the capacitor has become charged with
the opposite polarity. All of the energy is again stored in the capacitor.
