Principle
The students apply their knowledge of electrostatic induction to the electroscope. They recognize why a pointer deflection can appear even as a charged object approaches the electroscope. They can explain the series of events in the electroscope.
The potential measurement probe and the electric field meter can be used to study the equipotential lines around a charged sphere. When held in the radial clamp fixture, the probe can be conveniently swivelled into position along circles around the centre o ...
A uniform electric field E _ is produced between the charged plates of a plate capacitor. The strength of the field is determined with the electric field strength meter, as a function of the plate spacing d and the voltage U. The potentialø within the field i ...
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.
Tasks
To measure the course of current strength and voltage in a capacitance/inductivity in the instant of switching on. The capacitance/inductivity is determined from the measurement curve.
Metal spheres with different radii and a spherical capacitor are charged by means of a variable voltage. The induced charges are determined with a measuring amplifier. The corresponding capacitances are deduced from voltage and charge values.
A small electrically charged ball is positioned at a certain distance in front of a metal plate lying at earth potential. The surface charge on the plate due to electrostatic induction together with the charged ball forms an electricfield analogous to that which exi ...
Conducting spheres with different diameters are charged electrically. The static potentials and the accompanying electric field intensities are determined by means of an electric field meter with a potential measuring probe, as a function of position and voltage.
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.
Investigate the electric field, which is created by applying a voltage to two parallel rod electrodes.
Investigate what happens to the homogeneous electric field between two parallel rod electrodes, when the voltage, applied to the electrodes, is changed.
Investigate the electric field, which is created by applying a voltage to two circular electrodes.
Determine the equipotential lines of the electric field between the two electrodes and derive the electric field pattern.
What ...
Investigate how the electric field between two circular electrodes will change, when an electric conductor (here: a rod electrode) is inserted into the field.
A lightning forms a strong electric current, which is created, when in a medium (for example air) a large number of free charges is produced by strong electric fields. During a thunderstorm usually high elevations from earth (for example skyscrapers) are more ...
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