(21) The general equations are then applied to the calculation of the coefficients of mutual induction of two circular currents and the coefficient of self induction in a coil. The want of uniformity of the current in the different parts of the section of a wire at the commencement of the current is investigated, I believe for the first time, and the consequent correction of the coefficient of self induction is found. These results are applied to the calculation. of the self induction of the coil used in the experiments of the Committee of the British Association on Standards of Electric Resistance and the value compared with that deduced from the experiments.
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J. C. Maxwell’s, ‘Dynamical theory of the electromagnetic field’, 1864. From The Royal Society, PT/72/7
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