Item no.: P2430760 Principle A magnetic field is generated in a ring-shaped iron core by a continuous adjustable direct current applied to two coils. The field strength Η and the flux density B are measured and the hysteresis recorded. The remanence and the coercive field strength of two different iron cores can be compared. Tasks Record the hysteresis curve
Item no.: P2450201 Principle The Q factor of oscillating circuits is determined from the band width and by the Pauli method. In inductively coupled circuits (band-pass filters) the coupling factor is determined as a function of the coil spacing. Tasks Determine the dissipation factor t and k and the quality factor Q from the band
Item no.: P2440611 Principle The current and voltage of parallel and series-tuned circuits are investigated as a function of frequency. Q-factor and band-width are determined. Tasks Determination of the frequency performance of a Series-tuned circuit for voltage resonance without damping resistor, current resonance without damping resistor, current resonance with damping resistor. parallel-tuned circuit for current
Item no.: P2440260 Principle 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. Tasks Determination of the induction voltage as a function
Item no.: P2430400 Principle A conductor loop carrying a current in an uniform magnetic field experiences a torque. This is determined as a function of the radius, of the number of turns and the current in the conductor loop and of the strength of the external field. Tasks Determination of the torque due to a
Item no.: P2430362 Principle The spatial distribution of the field strength between a pair of coils in the Helmholtz arrangement is measured. The spacing at which a uniform magnetic field is produced is investigated and the superposition of the two individual fields to form the combined field of the pair of coils is demonstrated. Tasks
Item no.: P2420500 Principle 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. Tasks For a conducting sphere of diameter 2R = 12 cm, electrostatic potential
Item no.: P2360415 Principle The Stirling engine is submitted to a load by means of an adjustable torquemeter, or by a coupled generator. Rotation frequency and temperature changes of the Stirling engine are observed. Effective mechanical energy and power, as well as effective electrical power, are assessed as a function of rotation frequency. The amount
Item no.: P2410800 Principle The (cooling capacity) heating capacity and efficiency rating of a Peltier heat pump are determined under different operating conditions. Tasks To determine the cooling capacity Pc the pump as a function of the current and to calculate the efficiency rating hc at maximum output. To determine the heating capacity Pw of
Item no.: P2350101 Principle According of Stefan-Boltzmann’s law, the energy emitted by a black body per unit area and unit time is proportional to the power “four” of the absolute temperature of the body. Stefan-Boltzmann’s law is also valid for a so-called “grey” body whose surface shows a wavelength independent absorption-coefficient of less than one.