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This Java applet simulates a generator, which is reduced to the most important parts for clearness. Instead of an armature with many windings and iron nucleus there is only a single orthogonal conductor loop; the axis the loop is rotating around was omitted.

The radiobuttons in the top right corner allow it to choose a AC generator (without commutator) or a DC generator (with commutator). You can change the direction of rotation by using the corresponding button. The sliding control makes it possible to vary the rotational speed. You can stop and continue the simulation with the button "Pause / Resume". This, however, does not mean a real stop of the movement, for in this case the induced voltage would be reduced to zero.

Two black arrows mark the momentary direction of movement. You can recognize the magnetic field lines (directed from the red painted north pole to the green painted south pole) by the red color. The blue arrows represent the direction of the induced current (technical current direction).

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Physics Applets

© Walter Fendt, May 8, 1998
Last update: May 10, 1998

Thanks to Mr. Jürgen Giesen for his valuable suggestions!