The Variation of the Coefficients of Induction
W.E. Sumpner · Proceedings of the Physical Society of London · 1887
dC -O,W e see that L,=L, only when C=O or when -and that L, is greater than L, for sinal1 currents where L2 is increasing with C.Since 8, the magnetizing force, is proportional to C ; and since N is a. measure of.23, the averiige value of the AIIX oi induction per anit area, we we that L2 is directly propor.tional to p, the average d u e of' tlie coefficient of' niagnetic pernieability for the magnetizing force represented by the current C.If, therefore, the medimn be wliollyof one kind, L2 will be a measure of the permeability of that medium.In any case, however, if' we know the relation connecting 23 with @, we shall be able to determine the way in which the coefficient$ vary with the magnetizing force. .* This method, due to Prof. Ayrton, will be found more fdly