Lynde, Carleton John, b. 1872 · New York, Macmillan · leaf 208
rrententers the electromagnet and then passes downthrough the positive and negative carbons andout. Before the current is started the carbons aretogether. When the current starts, however,M becomes a magnet and lifts one end of theiron bar shown below. The bar grips the rodand lifts the rod and the… … FIG. 145.—Thearc lamp. 194 PHYSICS OF THE HOUSEHOLD current. As the current decreases, M decreases in strength andthe iron bar drops down. This allows the carbons to comecloser together. The instant the carbons come closer togetherthe arc is shortened, its resistance is decreased, and thereforethe…
Physics · Home Economics
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