The alternating-current resistance of parallel conductors of circular cross-section

The limitations of existing formulae for calculating the alternating-current resistance of a "go and return" system of two parallel conductors of circular cross-section are outlined, and an improved formula is developed. A table is given so that the alternating-current resistance may be evaluated in any given case in a few minutes. Experimental work was carried out to check the formula, and agreement was obtained to within 1 per cent.