Electricity and magnetism for advanced students (1920)
Starling, Sydney George, 1873- · London Longmans, Green · leaf 385
ct, but merely gives the value of thecouple when the condition Zp = »• is fulfilled. That this condition corresponds to a maximum couple may be 1 • • ^^^ 11- <^c proved by obtaining -j-r^ and showing that j- is decreasing when Ip = r. The quantity j2,y,2 _<_—a ^^^ ^^^^ plotted as ordinate in… … = p = 27r/t gives the maximum couple at the frequency n = ^r-= 1-59, and it will be seen that the quantity has the value 5 X 10^^ at this frequency,and the average couple is A^H- x 5 x lO-l Now H may in apractical case be, say, 1000, and if the coil have an effective area of,say, 10,000 sq. cms.—…
Electricity · Magnetism
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