Principles and practice of electrical engineering (1914)
Gray, Alexander, 1882-1921 · New York [etc.] McGraw-Hill Book Company, inc. · leaf 27
gnetic field is acted on by a force which is proportional 1 PRINCIPLES OF ELECTRICAL ENGINEERING [Chap, i to the strength of the magnetic pole and to the strength or in-tensity of the magnetic field. The intensity of a magnetic field at any point is taken as theforce in dynes on a unit pole at that… … Fig. 2.—Direction of the field of a magnet. Let NS, Fig. 2, be a magnet of pole strength m, and n a unit north pole.The pole N of the magnet repels the unit pole with a force = ra/ri2 dynes,represented in magnitude and direction by the line na; the pole S of the mag-net attracts the unit pole with…
Electrical engineering
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