Lessons in practical electricity; principles, experiments, and arithmetical problems, an elementary text-book (1902)
Swoope, Coates Walton. [from old catalog] · New York, D. Van Nostrand company · leaf 360
Fig. 310.- -Graphical Eepresentation of anAlternating Current. sen ting intervals of time. The vertical line, AM, at rightangles to it is divided into distances representing units ofcurrent, the current being in a positive direction when indi-cated above PK, and negative, when below PK. When the… … Fig. 311.—Graphical Representation of anAlternating Current. switch is closed the current immediately rises to its fullstrength of 5 amperes, or from P to A, and 5 amperes aremaintained constant in a positive direction for one second,A to B. When point B is reached at the end of the firstsecond the…
Electricity · Magnetism
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