International Library of Technology · Scranton, International Textbook Co. · leaf 248
Pig. 1488. The power curve is here constructed as before, but it isno longer wholly above the horizontal. The ordinate/^of the current curve is positive, while at the same instantthat of the E. M. F. curve _/ ^ is negative, consequently … tJf Fig. 1489. their product is negative, and the corresponding ordinate ofthe power curve is below the horizontal. This means thatduring the intervals of time a b and c d\ negative ivork isbeing performed; or, in other words, the circuit, instead ofhaving work done on it, is returning energy to…
Electrical engineering
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