Thomälen, Adolf, 1865-, Thomälen Adolf. Kurzes Lehrbuch der Electrotechnik. English · London, E. Arnold · leaf 271
itive whenever the pressure and current are momentarilyin the same direction (Fig. 252). On the other hand, the power is momen-tarily negative whenever the current and pressure are in opposite directions(Fig. 253). By the direction of the pressure we mean the direction from thepositive terminal or… … Fig. 252 Fig- 253 positive, we mean that the apparatus or part of the circuit under considera-tion is absorbing electrical energy and transforming it into some other formsuch as thermal or mechanical energy. When an apparatus has a negativepower it is generating electrical energy at the expense of…
Electrical engineering
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