Hawkins electrical guide. Questions, answers & illustrations; a progressive course of study for engineers, electricians, students and those desiring to acquire a working knowledge of electricity and its applications; a practical treatise (1914)
Hawkins, N. (Nehemiah), 1833- · New York, T. Audel · leaf 116
amperes X volts, theordinate FG is to be multiplied by ordinate FG that is, 2 X 3.7 = 7.4. Project up through F the ordinate FG = 7.4, and this will give onepoint on the power curve. Similarly at another pcint, say M, where the current and pressureare maximum MS X MS = MS, that is3 X 5 = 15 giving… … PlC 1.345.—Irjil method of drawing power curve from the pressure and current curves.A smaller scale is employed for the power curve in order to reduce its height. Ques. Why is the power curve positive in the secondhalf of the period when there are negative values of cur-rent and pressure? Ans.…
Electrical engineering
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