Text-book of general physics, for the use of colleges and scientific schools (1899)
Hastings, Charles Sheldon · Boston: Ginn & company · leaf 479
468 INDUCTION OF CURRENTS. To guard against sparking between different layers of thesecondary, it is usually wound in a number of disc-like coils,joined in series, but separated by insulating partitions. Theprimary current flowing from the battery is rendered inter-mittent by a vibrator, J, which… … Fig. 294. closing the circuit, when I is again attracted and the processrepeated. If the gap A is not too great, a spark will passeach time the primary circuit is broken. As the self-induction of the primary circuit is considerable, a spark isalso likely to form at K, when the current is broken,…
Physics
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