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 124
tance may be made very small in comparison to the react-ance so that a close approach to wattless current is possible. Ques. Give some examples where the phase differenceis very nearly 90:. Ans. If an alternator supply current to a circuit having a verysmall resistance and very large inductance,… … § 3 a J? Fig. 1.364.—Performance carves of Gen Ques. When the phase difference between the currentand pressure is 90:, why is the current called wattless? Ans. Because the product of such a current multiplied by thepressure does not represent any watts expended. A man lifting a weight, and then…
Electrical engineering
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