PEM (proton exchange membrane) technology refers to the type of fuel cell favoured by car makers and companies that build combined heat and power plants. The demonstration set-up depicted here produces hydrogen using the classic method by reacting hydrochloric acid with zinc in ...
The resistances of various DC conductors are determined by
recording the current / voltage characteristic. The resistivity of
metal rods and the contact resistance of connecting cords are
First Kirchhoff's laws are verified by measuring current,
voltage and resistance in series and parallel circuits. The
Wheatstone bridge circuit is used to determine unknown resistances
In a semi-conductor thermogenerator, the no-load voltage and the
short-circuit current are measured as a function of the temperature
difference. The internal resistance, the Seebeck coefficient and
the efficiency are determined.
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