A text book of physics, for the use of students of science and engineering (1918)
Duncan, John, d. 1941, Starling, Sydney George, 1873- · London Macmillan · leaf 1010
is case has the form of a ring. Considering this as the primary, the secondary consists of a great number of turns of fine wire having terminals CD. An alternating currenl may be represented by a curve, such as LXXVI THE TRANSFORMER 985 the thick line curve in Fig. 920. At points such as A, C and E… … Fig. 920.—Current and e.m.f. curves for the transformer. the primary current is for a moment constant and the secondaryB.m.f. is zero. The dotted curve represents the secondary e.m.f. Itshould be noticed that the curves are not drawn to scale. For a step-down transformer CD (Fig. 919) would be the…
Physics
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