Formula for the Inductance of a Helix Made With Wire of Any Section (Classic Reprint)

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Excerpt from Formula for the Inductance of a Helix Made With Wire of Any SectionIn Appendix 10 the exact expressions are obtained for the magnetic field of a helical current filament, infinite in length. An equation is obtained for the magnetic lines of force in the immediate neighbor hood oi the helix in a plane through its axis. The lines of magnetic force very close to'the filament (and in this plane) are identical with the equipotential lines of a charged grating, which are shown in Fig ure 13 of volume 1 of Maxwell's Treatise.In Appendix 11 the mutual inductance of the leads with the helix is computed for a certain arrangement of the former.About the PublisherForgotten Books publishes hundreds of thousands of rare and classic books. Find more at www.forgottenbooks.comThis 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.