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Principle
The resistance of a short thick wire is different to that of a long thin one.
Tasks
Examine how the value of the resistance of a wire depends on its length and cross-sectional area.
Many controls on electrical devices are potentiometers. A potentiometer acts as a voltage divider. It corresponds to a series connection of two variable resistors with a centre tap, whereby the sum of the resistance of the two resistors remains consta ...
Capacitors are devices that can store charge. Here the details of how the charge gets in and out of the capacitor is looked at.
Examine the behaviour of the voltage and current of a capacitor during the charg ...
A diode only allows electric current to pass in one direction and blocks the other one to the current. It therefore acts as an electric valve. This enables alternating current to also be usable to pump charge into a capacitor.
Tasks< ...
A diode only allows current to flow in one direction and blocks the flow of itin the other direction. So the current can flow only during a half wave through a diode in an alternating current circuit.
Measure ...
Our objective in this experiment is to find the connection between electric direct voltage and the direct current that it causes. Ohm's law will be verified and the values of the different resistors will be determined from the experimental results.
How is it possible, that the fuel / air mixture of a spark ignition engine can be ignited by a voltage of up to 30,000 V, but the car battery only supplies 12 V? We will get to the bottom of this phenomenon in this experiment. When the magnetic field ...
A capacitor fitted in a direct current circuit has an infinitely large ohmic resistance so no current is measurable. In an alternating current circuit, however, a capacitor behaves completely differently. The resistance of it is finite and a cu ...
A coil in a direct current circuit has an ohmic resistance because of the wire. In an alternating current circuit, however, it has an additional resistance alongside the ohmic resistance, the so-called inductive reactance. This experiment deals with w ...
The electrical resistance of pure metals increases with increasing temperature. The correlation between voltage and current is to be measured using temperature-in- and dependent resistors. Determine the work and power of an incandescent bulb.
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 ...
Determine the current strength flowing through a semi-conducting diode. Determine the collector current with the collector voltage for various values of the base current intensity.
A capacitor is charged by way of a resistor. The current is measured as a function of time and the effects of capacitance, resistance and the voltage applied are determined.
The electric constant is determined by measuring the charge of a plate capacitor to which a voltage is applied. The dielectric constant is determined in the same way, with plastic or glass filling the space between the plates.
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