Principles and practice of electrical engineering (1914)
Gray, Alexander, 1882-1921 · New York [etc.] McGraw-Hill Book Company, inc. · leaf 334
rections, the resultant vector R alternates between thevalues R = 2P and R = —2P, and always lies in the line joiningthese two points. An alternating magnetic flux </>, such as that in Fig. 362, istherefore equivalent to two rotating fields <\>x and 4>y which are of 308 Art. 339]…
Electrical engineering
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