A PROGRESSIVE COURSE OF STUDY FOR ENGINEERS, ELECTRICIANS, STUDENTS AND THOSE DESIRING TO ACQUIRE A WORKING KNOWLEDGE OF The word "_alternating_"--advantages of alternating current--direct current apparatus; alternating current apparatus--disadvantages of alternating current--~alternating current principles~--the sine--application and construction of the sine curve--~illustrated definitions~: cycle, alternation, amplitude, period, periodicity, frequency--commercial frequencies--advantages of low frequency--~phase~--phase difference--phase displacement--synchronism--"in phase"--curves illustrating "in phase" and "out of phase"--~illustrated definitions~: in phase; in quadrature, current lead…
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