Thomälen, Adolf, 1865-, Thomälen Adolf. Kurzes Lehrbuch der Electrotechnik. English · London, E. Arnold · leaf 88
rial, B = H, and the total amount of work done in raising the magneticinduction from 0 to S will be . f^A.l ^ ,„ B\A.l , ^ = j„ -^■^■^^=-8^^^g^ (55). This amount of energy has to be given to the coil, as we shall see inSection 35, in the form of electrical energy. The volume of the magneticfield is… … 30. The Lifting Power of an Electromagnet 73 We will now make use of this result, in order to find the lifting power ofan electromagnet. Fig. 64 represents an iron ring, uniformly wound so as toobviate magnetic leakage, and dividedinto two similar halves. We haveseen that if the magnetic flux…
Electrical engineering
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