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), 1833-1928 · New York : T. Audel & Co. · leaf 151
ance, if n equal the number of magnetic lines embraced by thecircuit at the beginning of the movement, and n the number embracedafter a very short interval of time t, then the average induced electromotive force = n — n It would require the cutting of 100,000,000 lines per second to producean… … MAG/VET GALVANOMETER Fig. 130.—Experiment illustrating Lenzs law which states that in all cases of electromagneticinduction, the direction of the induced current is such as to tend to stop the motion producingit. In the experiment, in order to produce the induced current, energy must be expendedin…
Electrical engineering
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