Daviss Manual Of Magnetism Including Galvanism Magnetism Electro Magnetism

Author : Daniel Davis
Publisher : Rarebooksclub.com
ISBN 13 : 9781230173153
Total Pages : 68 pages
Book Rating : 4.1/5 (731 download)

DOWNLOAD NOW!

Download or read book Davis's Manual of Magnetism, Including Galvanism, Magnetism, Electro-Magnetism, Electro-Dynamics, Magneto-Electricity, and Thermo-Electricity written by Daniel Davis and published by Rarebooksclub.com. This book was released on 2013-09 with total page 68 pages. Available in PDF, EPUB and Kindle. Book excerpt: This historic book may have numerous typos and missing text. Purchasers can usually download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1854 edition. Excerpt: ... are secured little brass rings, which answer the purpose of rollers. The two wires being placed together, as represented by the dotted lines at A, let a U-magnet, held in a vertical position over them, be gradually brought near, keeping the poles in the direction of the length of the wires. As the magnet approaches, the wires become charged, the similar poles lying in the same direction. Whet the magnet is brought so near as to occasion sufficient repulsion between the induced poles, the wires recede from each other, as shown at B B, in the cut. ATTRACTION OF ARMATURE. 227. Y-armature.--This consists of a piece of soft iron, in the shape of the letter Y. If one of the Fig. 90. branches of the fork be applied to the north pole of a horseshoe magnet, as seen in Fig. 90, the lower end of the armature, and also the other branch of the fork, acquire north polarity, and will sustain small pieces of iron. If both branches of the fork be applied, one to each pole of the magnet, as shown by the dotted lines in the cut, the polarity of the lower end immediately disappears. This is because the two poles tend to induce opposite polarities of equal intensity in the extremity of the armature, which of course neutralize each other. If the branches of the fork are applied to the similar poles of two magnets, their influence will conspire in inducing the same polarity in the lower end, and a greater weight will be supported by it, than when one branch is applied to a single pole. 228. When the two extremities of an iron bar are ected upon at once by both poles of a magnet, there is a double induction, and the effect is greatly increased. Thus, let N S (Fig. 91) be a compound U-magnet, and A an iron armature, of such a length that, while one end is...