Andrews, Ernest John, 1863-, Howland, Howard Newell, 1865- joint author · New York, London, The Macmillan company · leaf 254
he direction of the north pole of the magnet. Reversing the direction of the flow of current reversesthe poles of an electromagnet. Reversing the winding ofa coil, the current flowing through it from the same endall the time, reverses the poles of a magnet. One of the most important appli-cations… … 240 ELECTRICITY [§385 with D removed. M in each figure represents an electro-magnet with core projecting above the brass soundingbar ; / an iron crosspiece fastened at rightangles to B; P the point where B ispivoted to the support A; J) a piece of^ brass placed as shown; and 0 and Cscrews for…
Physics
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