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Excerpt from Alternating Current Wiring and Distribution
When a current is started ifl a wire each line or element of increasing current tends to induce counter E. M. R.'s or reverse currents in the metal in its neighborhood; thus all the metal in the Wire is subjected to two opposing forces, one to create current flow and the other to retard it. The cen tral portions Of the wire are surrounded by these retarding influences while the outer surface Of the wire can receive them from one side only. The result Of this is that when a wire is suddenly sub jected to an E. M. F. The current begins first to flow on its surface, and an appreciable time elapses be fore the full current density reaches the centre Of the wire. Thus the current may be said to begin on the outside and soak into the wire. If the al ternations are sufficiently frequent the central por tions of the wire are practically never reached by the current, and the copper available for conduct tivity is little greater than what it would be if the conductor were a tube of similar outside diameter. The thickness of the walls of the equivalent tube will be less as the frequency increases. It is easy to understand that this effect is relatively greater with large wires than with small also, that it will be much greater with iron than with copper wires.
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This book is a reproduction of an important historical work. Forgotten Books uses state-of-the-art technology to digitally reconstruct the work, preserving the original format whilst repairing imperfections present in the aged copy. In rare cases, an imperfection in the original, such as a blemish or missing page, may be replicated in our edition. We do, however, repair the vast majority of imperfections successfully; any imperfections that remain are intentionally left to preserve the state of such historical works.
When a current is started ifl a wire each line or element of increasing current tends to induce counter E. M. R.'s or reverse currents in the metal in its neighborhood; thus all the metal in the Wire is subjected to two opposing forces, one to create current flow and the other to retard it. The cen tral portions Of the wire are surrounded by these retarding influences while the outer surface Of the wire can receive them from one side only. The result Of this is that when a wire is suddenly sub jected to an E. M. F. The current begins first to flow on its surface, and an appreciable time elapses be fore the full current density reaches the centre Of the wire. Thus the current may be said to begin on the outside and soak into the wire. If the al ternations are sufficiently frequent the central por tions of the wire are practically never reached by the current, and the copper available for conduct tivity is little greater than what it would be if the conductor were a tube of similar outside diameter. The thickness of the walls of the equivalent tube will be less as the frequency increases. It is easy to understand that this effect is relatively greater with large wires than with small also, that it will be much greater with iron than with copper wires.
About the Publisher
Forgotten Books publishes hundreds of thousands of rare and classic books. Find more at www.forgottenbooks.com
This book is a reproduction of an important historical work. Forgotten Books uses state-of-the-art technology to digitally reconstruct the work, preserving the original format whilst repairing imperfections present in the aged copy. In rare cases, an imperfection in the original, such as a blemish or missing page, may be replicated in our edition. We do, however, repair the vast majority of imperfections successfully; any imperfections that remain are intentionally left to preserve the state of such historical works.
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- PublisherForgotten Books
- Publication date2018
- ISBN 10 1333980264
- ISBN 13 9781333980269
- BindingPaperback
- Number of pages82
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Alternating Current Wiring and Distribution (Classic Reprint)
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ISBN 13: 9781333980269
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Book Description Paperback. Condition: New. Print on Demand. Excerpt from Alternating Current Wiring and Distribution. About the Publisher, Forgotten Books publishes hundreds of thousands of rare and classic books. This book is a reproduction of an important historical work. Forgotten Books uses state-of-the-art technology to digitally reconstruct the work, preserving the original format whilst repairing imperfections present in the aged copy. In rare cases, an imperfection in the original, such as a blemish or missing page, may be replicated in our edition. We do, however, repair the vast majority of imperfections successfully; any imperfections that remain are intentionally left to preserve the state of such historical works. This text has been digitally restored from a historical edition. Some errors may persist, however we consider it worth publishing due to the work's historical value. The digital edition of all books may be viewed on our website before purchase. print-on-demand item. Seller Inventory # 9781333980269_0
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