ani-cal motion into electrical energy.It is based upon the principle ofcurrent induction and contains aseries of closed coils, called thearmature, revolving in a magneticfield in such a way that the numberof Hues of force cut, and the di-rection in which they are cut variescontinuously. The manner… … FlG. 122. Electro-Dynamics. 151 sible number of lines of force will pass through it. As itrotates, this number decreases until it has turned one fourthof a revolution, at which point the number becomes zero.During the next one fourth revolution the number of linesincreases, and after the first half…
Physics
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