Abstract
A PROBLEM of some considerable importance to the practical engineer or physicist is that of calculating the effective self-induction of a circuit consisting of two parallel wires, the one being the return of the other. When the wires are not very close together, and their current is either steady or only very slowly alternating, satisfactory results are known to be given by the formula where L is the self-induction of a length l, c the distance between the wires, which have radii a, b, and l2 the permeabilities of their materials. But if the current oscillates rapidly, this formula fails to give even approximately correct results. Now in many practical problems, such, for example, as the measurement of small inductances not greater than 1000 microhenries, it is necessary to employ long leads to keep them at some considerable distance from bridge and other circuits. A knowledge of the self-induction of such leads is very desirable. Some results which I have recently obtained are capable of finding this quantity in most useful cases, and it may prove of use to give a short statement of them, pending more detailed publication.
Similar content being viewed by others
Article PDF
Author information
Authors and Affiliations
Rights and permissions
About this article
Cite this article
NICHOLSON, J. Inductance in Parallel Wires . Nature 77, 295 (1908). https://doi.org/10.1038/077295a0
Issue Date:
DOI: https://doi.org/10.1038/077295a0
Comments
By submitting a comment you agree to abide by our Terms and Community Guidelines. If you find something abusive or that does not comply with our terms or guidelines please flag it as inappropriate.