. Contributions. e in plotting the totalhysteresis curve of soft iron, we should expect greater errors due to eddycurrents than would arise in the case of hard steel. This argument,however, does not apply to demagnetization and recovery cur\es since 379 N. H. WILLIAMS. [SecondLSeries. the slope does not vary greatly from point to point along the curveand the time required for demagnetization or recovery is 1/120 of asecond irrespective of the magnitude of the change. Hence for a givenflux variation and for a given size of wire, effects due to eddy currentsfor soft iron ought not to differ wide
. Contributions. e in plotting the totalhysteresis curve of soft iron, we should expect greater errors due to eddycurrents than would arise in the case of hard steel. This argument,however, does not apply to demagnetization and recovery cur\es since 379 N. H. WILLIAMS. [SecondLSeries. the slope does not vary greatly from point to point along the curveand the time required for demagnetization or recovery is 1/120 of asecond irrespective of the magnitude of the change. Hence for a givenflux variation and for a given size of wire, effects due to eddy currentsfor soft iron ought not to differ widely from those in steel. Curve Dof Fig. 12 was obtained from this new ring of soft iron wire. The phasedifference at the maximum and minimum points of the current and fluxcurves was so slight that no attempt was made to correct for eddy cur-rents. Apparently the hysteresis is somewhat larger than for the steel ?T\t\^ 1 ?)o\\i\ Core o^TeYv\Stee\. To SKow ( I!,AJ».iA GuTrevvtbi/owc-r—Curve irCorrected Sbecvmen C okTrViMScorwer Vron. ?PotTvoyI oii\\u\ ? K
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