Electricity and magnetism for advanced students (1920)
Starling, Sydney George, 1873- · London Longmans, Green · leaf 359
nt; that is, we /2irII sin- a da0 must find the value of the quantity, Now, /•27r / da = 27r,Jo J IT da 348 aud, ELECTRICITY AND MAGNETISM 2ir CHAP. 1 — COS 2a da [a sin 2ap2 ^~Jo mean value = = ttIo^ ri;- ^ !„_: 27r 2 i Virtual Current and E.M.F.—The same value of the mean wouldhave been obtained… … Fig. .324. are plotted, when Iq = 3. The line AB has the same mean ordinateas the curve I. The continuous current represented by CD, whosesquare would have the same mean value as that of the alternat-ing current is therefore —^, and would give the same reading on a hot-wire ammeter. This is called…
Electricity · Magnetism
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