A Suppressed-Zero Electrodynamic Voltmeter (Classic Reprint)

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Excerpt from A Suppressed-Zero Electrodynamic VoltmeterThe principal application of the' instrument described above has been for the measurement of the secondary voltage of potential transformers. The primary voltage is then known as accurately as the ratio of transformation is known, that is, to within about per cent at best. It has been found useful in various experiments where it was necessary to hold an alternating voltage constant within narrow limits, since it will detect and follow variations in voltage that can not be seen with the best portable instruments.9 It has also been used in the calibration of high-grade portable voltmeters.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.