Principle
A gas discharge tube is connected to a vacuum pump. Applying a high voltage causes a variety of light phenomena in the tube, which are dependent on the pressure at that moment. The 0...10-kV high-voltage power supply used here (13670-93) is particularly appropriate ...
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 hydrochlori ...
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 ...
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 calculated.
Tasks
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 tempe ...
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 regu ...
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 more precisely.
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 an ...
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 correlation between the amounts of substances transformed in the electrode reaction and the applied charge (amount of electricity) is described by Faraday´s law. Faraday ´s constant, which appears as a proportionality factor, can be determined experi ...
In this experiment a copper(II) sulphate solution is to be electrolysed using two different materials - graphite electrodes and copper wires. During the electrolyses the current/voltage curves are recorded.
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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