United States or Saint Helena, Ascension, and Tristan da Cunha ? Vote for the TOP Country of the Week !
All the observations, electrical and mechanical, are made simultaneously. Graphic representations are of the greatest value in all comparative tests. Mr. The speeds are plotted as abscissae, and the electrical work absorbed in watts divided by 746 as ordinates; then with a series-wound motor we obtain the curve, EE. The shape of this curve depends on the type of the motor.
In the "magneto-electric" machine the FIELD MAGNETS are simply steel bars permanently magnetised, but in the ordinary dynamo the field magnets are electro-magnets excited to a high pitch by means of the current generated in the moving conductor or armature. In the "series-wound" machine the whole of the current generated in the armature also goes through the coils of the field magnets.
Word Of The Day