Thomälen, Adolf, 1865-, Thomälen Adolf. Kurzes Lehrbuch der Electrotechnik. English · London, E. Arnold · leaf 197
Fig. 165 Fig. 166 right, the main arm leaves the end contact and thereby puts the first re-gulating eel] in series with the battery across the mains. The auxiliaryresistance is in circuit, however, and the increase of pressure is less thantwo volts by an amount depending on the current. On turning…
Electrical engineering
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