Thomälen, Adolf, 1865-, Thomälen Adolf. Kurzes Lehrbuch der Electrotechnik. English · London, E. Arnold · leaf 75
carrying the current / are equivalent to a belt I cm wide carrying a current T.F. The«& current which in Fig. 53 flows annnnnikr, nj^ in the Strip of width dx istherefore equal to rp J, ax ^ -^ ■ r Imagine a unit pole to beplaced at the centre of thesolenoid. The force exerted onit by the band… … 1]. Magnetic Field of a Solenoid 6i Putting this value for dx in the equation for dH and integrating betweenthe limits tt — a^ and + a^, we get T 1+. 47r.r./ - cos a = -—1 . cos «! (41)- „ /■+«. 27r.r.7 . , 27r.r./| H = — I 5 .sina.da = I I For very long solenoids cos «i is practically equal to i,…
Electrical engineering
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