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A text-book of electrical engineering; (1920)

Thomälen, Adolf, 1865-, Thomälen Adolf. Kurzes Lehrbuch der Electrotechnik. English · London, E. Arnold · leaf 208

An illustration from A text-book of electrical engineering;, 1920, leaf 208
t and the normal to the curve at the point A,we have (see Fig. 176) ^^ ^^^ tana= ~ ^T= -tt^.at AC and since AC = n ■r^^- Hence We have already found P^ ■■ Pa = 2k.BC. = OD for this speed in Fig. 175. It is evidentthat from a knowledge of P^ and BC, we could calculate the moment ofinertia of the… … on the curve in Fig. 176, and draw the normal and the ordinate, then thesubnormal, i.e. the intercept on the base line between the ordinate and thenormal, represents the power being dissipated at that speed. The experiment is then repeated with the field magnets unexcited, inwhich case the time…

Electrical engineering

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