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 139
flux density to magnetizing force.Permeability is a measure of the ease with which magnetism passesthrough any substance. The permeability of good soft wrought ironis sometimes 3000 times that of air, varying with the quality of theiron. MAGNETISM 119 Ques. What is the effect of increasing the… … Fig. 122.—Action of currents on solenoids. To demonstrate this fact experimentally, a solenoidis constructed as shown, so that it can be suspended by two pivots in the cups a and c.The solenoid is ther movable about a vertical axis, and if a rectilinear current QP be passedbeneath it, which at the…
Electrical engineering
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