ELEMENTS OF ELECTRICITY BY ANTHONY ZELENY, PH. D. Professor of Physics, University of Minnesota SECOND EDITION FIFTH IMPRESSION McGRAW-HILL BOOK COMPANY, INC. NEW YORK AND LONDON 1935, BY THE McGRAW-HiLL BOOK COMPANY, PREFACE TO THE SECOND EDITION The treatment of the electromotive force impressed by a moving magnetic, field on a stationary conductor has been changed from that given in the first edition to one requiring the introduction of one more basic phenomenon which, however, is shown to be a consequence of relative motion. This treatment makes clear the distinction between the conservative and the non conservative electric fields and thereby also clarifies the picturing of electromagnetic pulses. The action of the thermocouple is treated at length and unusual clarity is believed to have, been attained by representing diagrammatically the magnitudes of the contributing Thomson and Peltier effects. The chapter on Alternating Currents has been enlarged, and capacitive circuits are...

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