![]() ![]() ![]() The voltage zipping through the air between the two coils creates sparks in the gap and, eventually, the charge in the secondary capacitor becomes so high that it breaks free in a spectacular burst of electric current. This field collapses quickly and generates an electric current in the secondary coil. ![]() Then, the current flows out of the capacitor down the primary coil and creates a magnetic field. The primary coil's capacitor eventually builds up so much charge that it breaks down the air resistance in the spark gap. The two coils and capacitors are connected by a spark gap. To observers, it appears as if lightning is being shot into the air.Ī Tesla coil consists of a primary coil and a secondary coil, each with its own capacitor to store electrical energy. It is a transformer used to produce high-voltage, low-current, high-frequency alternating-current electricity. Chances are that you have already seen this invention. ![]()
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