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COLLECTED PHYSICAL PAPERS
233
Hence conduction in such cases does not obey Ohm's law. The resistance is not independent of the E. M. F.
Fig. 52. Characteristic Curves of a Single Point Iron Receiver. A, B, C, D, E are different curves for different initial currents. C′ is the curve for a constant resistance.
but varies with it. A remarkable analogy is here presented with the phenomenon of magnetic con-
