An elementary book on electricity and magnetism and their applications (1919)
Jackson, Dugald C. (Dugald Caleb), 1865-1951, Jackson, John Price, b. 1868, Black, Newton Henry, b. 1874 · New York, The Macmillian Co · leaf 343
simple heat-ing effect of a current, is entirely inde-pendent of its direction. Thereforethe heating effect of a current de-pends upon the average of the squaresof each instantaneous value of the cur-rent. So, to get the heating effectof an alternating current such asthat shown by the curve in… … Fig. 216. — Heat curve and klternating-current curve. PRINCIPLES OF ALTERNATING CURRENT* 313 represented by the height of the line FG above OX, and finallywe extract the square root of this average and obtain the effec-tive value of the alternating current. Thus Effective value = VAverage of…
Electricity · Magnetism
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