Electricity and magnetism for advanced students (1920)
Starling, Sydney George, 1873- · London Longmans, Green · leaf 248
, so that itsnew position is ABC (Fig. 233). Owing to the nresence of a N pole ofstrength m, situated at N, work is done when the displacement occurs,and the potential energy of the system consisting of the pole and thecurrent is changed, on moving the circuit from the first to the secondposition,… … Fig. 233. 238 ELECTRICITY A^^D MAGNETISM chap. part of the circuit. Then FcZ*-. dx is the work done on the elementds during the displacement. And for the whole circuit work done during displacement = ^Fds . dx. The area swept out by the element ds is that of the figure efgh =ds .dx.&in^; and…
Electricity · Magnetism
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