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When the ringer switch - off the circuit. Electric current through the primary coil will change the tempo accordingly. This will cause a magnetic field that changes the axis of the ring. The coil B is the magnetic field of the coil, so this change will induce a voltage potential is very high. Potential short Will appear at both ends of the coil B which made them narrow the gap. The electric field within the channel will be enough to keep the strait air disintegration. It is an electrical conductor to an electrical current through the strait. Therefore, every time the switch is closed or open circuit. The electric spark passes through the Strait of this
when Hz using a flat metal attached to both ends of the secondary winding on Channel G and wire conductor bent into a circular by the Channel D and then brought near the Strait G enough. Figure 18.3 should be noted that electric spark Channel D each time sparking electrical Channel G.
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