Talk:Hanna curve
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Seems the Hanna curve is not defined in the text of this article; the example of Hanna curve shows something different from Hanna curve defined in 1st reference (and the 2nd one does not tell what the Hanna curve is).
From the 1st reference (and Philips Soft ferrites - Components and materials Part 4a Nov 1978): Hanna curve is a plot specifying L*I^2 as function of N*I, where I is current, N is number of turns of the coil, L is differential inductance (i.e. coil inductance measured by applying small current variation and measuring EMF on the coil).
JerzyTarasiuk (talk) 13:39, 16 April 2013 (UTC)