Thomälen, Adolf, 1865-, Thomälen Adolf. Kurzes Lehrbuch der Electrotechnik. English · London, E. Arnold · leaf 62
now the strength of field is to be measured both by the force on unitpole and by the number of lines per square centimetre, both methods givingthe same result, the unit for the line offorce cannot be arbitrarily chosen. In afield of unit strength there must be oneline per sq. cm. To make this… … Fig- 34 On the above assumption the numberof lines per sq. cm must be the samefigure, viz. i. Hence a line of forcerepresents the total flux of force, so to say, which passes through i sq. cm of the surface of a sphere of i cmradius, described about a unit pole. The surface of a sphere is 4^2, that…
Electrical engineering
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