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 ...
Electrical energy from solar cells supplies an electrolyser. The gases generated by the PEM electrolyser - hydrogen and oxygen - are sent directly to the PEM fuel cell. The electrical energy generated is used to drive a small motor. The solar cells can be irradiated by a ...
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
The temperature dependence of an electrical parameter (e.g. resistance, conducting-state voltage, blocking voltage) of different components is determined. To do this, the immersion probe set is immersed in a water bath and the resistance is measured at regular temperature
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
The force acting on a current-carrying conductor loop in a uniform magnetic field (Lorentz force) is measured with a balance. Conductor loops of various sizes are suspended in turn from the balance, and the Lorentz force is determined as a function of the current and magnetic ...
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.
The Hall effect in thin zinc and copper foils is studied and the
Hall coefficient determined. The effect of temperature on the Hall
voltage is investigated.
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