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Principle
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 ...
How does an equalizer function? Equalizers are used in sound engineering to improve tone in stereo systems and in audio computer software, for example. Their basic effect is to weaken certain frequencies of a signal and so to optimize the acoustic con ...
An oscillating circuit consists mainly of a coil and a capacitor. In this experiment, a close examination of the behaviour of the voltage and the current in an oscillating circuit is to be undertaken and the intrinsic angular frequency is to be deter ...
An alternating current circuit that consists of a coil and a capacitor switched in parallel to each other is called a parallel-resonant circuit. As is known from previous experiments, there is a phase shift between the current and the voltage at a co ...
An alternating current circuit that consists of a coil and a capacitor switched in series to each other is called a series resonant circuit. As is known from previous experiments, there is a phase shift between the current and the voltage at a coil or ...
A magnetic field of variable frequency and varying strength is produced in a long coil. The voltages induced across thin coils which are pushed into the long coil are determined as a function of frequency, number of turns, diameter and field strength.
Principle:
The coil is connected in a circuit with a voltage source of variable frequency. The impedance and phase displacements are determined as functions of frequency. Parallel and series impedances are measured.
Tasks:
A capacitor is connected in a circuit with a variable-frequency voltage source. The impedance and phase displacement are determined as a function of frequency and of capacitance. Parallel and series impedances are measured.
Tasks
The current and voltage of parallel and series-tuned circuits are investigated as a function of frequency. Q-factor and band-width are determined.
Determination of the frequency performance of a
The ripple of the output voltage of various rectifier circuits is measured as a function of the load current strength and the charging capacitance. The characteristics of a voltage stabilizer and of a multiplier are investigated.
Resistor-Capacitor (RC) circuits serve as filters for frequencies. The frequency response of the most commonly used RC filters is recorded by point-by-point measurements as well as the frequency sweep method, and displayed on the oscilloscope. The results are plott ...
A coil, a capacitor, an ohmic resistance and combinations of these components are investigated for their filter characteristics as a function of frequency. The phase displacement of the filters is determined also as a function of frequency.
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