Resistance Coils for Alternating Current Work (Classic Reprint)

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Excerpt from Resistance Coils for Alternating Current Work The effect upon phase angle in these cases is also interesting. In the first case, where the wire for the different coils is all of the same size, the capacity, inductance, and resistance all increase directly as the length l, so that L' (k - K1l3) where K and K1 are constants. This shows that the term containing capacity increases much more rapidly than the inductance term, so that if a 100 ohm coil has zero phase angle, a similar 1000-ohm coil will have a decided negative phase angle, the real inductance being only 1 per cent of the effective inductance. With the 10 ooo-ohm coil this effect' is greatly increased, so that the real inductance becomes negligible. With coils similarly wound, but of different sizes of wire, so that they have the same surface, the inductance and capacity increase in the same ratio as the resistance increases. Hence, while the increase in the phase angle, is less rapid, the relative importance of the inductance and capacity terms is the same. 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.