Basic DC Theory
Figure 2 Basic DC Generator
Due to this commutator action, that side of the armature coil which is in contact with either of
the brushes is always cutting the magnetic field in the same direction. Brushes 1 and 2 have a
constant polarity, and pulsating DC is delivered to the load circuit.
A thermocouple is a device used to convert heat energy into a voltage output. The thermocouple
consists of two different types of metal joined at a junction (Figure 3).