the bell system technical journal uctance conforms to the eciuivalent magnetic circuit offig 4 in this case pa is given by jro xa and equation 12 be comes f 2stta ro i which may be written in the more familiar form 2irniy f a v 13 for conformity with 13 the pull for a gien value of x should varyas au giving a linear plot with a slope of two when plotted againstxv7 on logarithmic paper fig 11 shows pull measurements of the relayof fig 2 plotted in this way the dashed lines tangent to the curveshave a slope of two and conform in this respec 2crwyby.jpg from sex‏ confo bandaxxx com‏ View Photo