he oppositely di-rected currents of the dynamo flow in the same directionthrough the external circuit a special device called thecommutator is used. For the dynamo just described itwould consist of a brass tube divided into two parts bycutting it lengthwise (Fig. 123). These two segments… … 152 Elements of Physics. same time the current reverses in the coil. In this wayone is always kept positive and the other negative, makingthe current direct through the exter-nal circuit. In a dynamo armaturehaving more than one coil there aretwo diametrically opposite commuta-tor strips to every…
Physics
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