Thomälen, Adolf, 1865-, Thomälen Adolf. Kurzes Lehrbuch der Electrotechnik. English · London, E. Arnold · leaf 272
ow plotted giving the momentary values of the power foundby multiplying together the corresponding values of current and p.d. Thesevalues of the power are positive during the intervals OA and BC, but nega-tive during the shorter intervals AB and CD, as shown by the dotted curveP, which represents… … Fig- 254 below. The mean power is found by subtracting the area below the linefrom the area above the line, and dividing the difference by the time. It isevident that the power supplied to the apparatus is less than we shouldexpect from multiplying together the pressure and the current as read…
Electrical engineering
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