Lessons in practical electricity; principles, experiments, and arithmetical problems, an elementary text-book . tJ -Inverse InducedSecondary Current. c[=iS Fig. 269.—Direct InducedSecondary Current. from the primary, CD, cut the secondary circuit, AB, andan inverse* momentary current flows through the secondary,left-hand diagram, Fig. 270, for the period of time required ELECTR OMA GNETIC IND UCTION. 301 to establish the electromagnetic field around the primary,% 315. When the switch is opened the magnetic linesof the primary will collapse upon it and again cut thesecondary, but in the opp

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Lessons in practical electricity; principles, experiments, and arithmetical problems, an elementary text-book . tJ -Inverse InducedSecondary Current. c[=iS Fig. 269.—Direct InducedSecondary Current. from the primary, CD, cut the secondary circuit, AB, andan inverse* momentary current flows through the secondary,left-hand diagram, Fig. 270, for the period of time required ELECTR OMA GNETIC IND UCTION. 301 to establish the electromagnetic field around the primary,% 315. When the switch is opened the magnetic linesof the primary will collapse upon it and again cut thesecondary, but in the opposite direction, producing a direct. Fig. 270.—Inverse Induced Current on Make of Circuit, DirectCurrent on Break. current, right-hand diagram, Fig. 270. If the primaryswitch be automatically closed and opened a great manytimes per second, the momentary induced currents will be-come constant in duration, but will change their direction with,ps Primary Coil

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