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Direct linkHolz, Christoph; Pusch, Alexander – Physics Education, 2020
Powerbanks differ in the amount of energy they can store. Usually this capacity (in a colloquial sense) of the powerbanks is stated in the form of charge in mAh for effective advertising. From a physical point of view, shouldn't the energy that a powerbank can provide be of interest? For students, charging smartphones with power banks is…
Descriptors: Power Technology, Energy, Physics, Computer Uses in Education
St. John, Stuart A. – Physics Education, 2017
Understanding Physics is a great end in itself, but is also crucial to keep pace with developments in modern technology. Wireless power transfer, known to many only as a means to charge electric toothbrushes, will soon be commonplace in charging phones, electric cars and implanted medical devices. This article outlines how to produce and use a…
Descriptors: Physics, Telecommunications, Power Technology, Electronic Equipment
Aguilar, Horacio Munguía; Maldonado, Rigoberto Franco; Navarro, Luis Barba – Physics Education, 2017
Charging a capacitor with a photovoltaic module is an experiment which reveals a lot about the modules characteristics. It is customary to represent these characteristics with an equivalent circuit whose elements represent its physical parameters. The behavior of a photovoltaic module is very similar to that of a single cell but the electric…
Descriptors: Electromechanical Technology, Power Technology, Energy, Science Education
Straulino, S.; Cartacci, A. – Physics Education, 2014
The measurement of the force acting between two parallel, current-carrying wires is known as Ampère's experiment. A mechanical balance was historically employed to measure that force. We report a simple experiment based on an electronic precision balance that is useful in clearly showing students the existence of this interaction and how to…
Descriptors: Measurement Techniques, Physics, Motion, Energy
Mayer, V. V.; Varaksina, E. I. – Physics Education, 2014
Students receive a more complete conception of scientific cognition methods if they reproduce fundamentally important historical investigations on their own. Ohm's investigation realized in 1826 is one of these. This paper presents a simple and accessible experimental unit, in which Ohm's ideas are implemented with the help of modern…
Descriptors: Investigations, Science Education History, Science Experiments, Units of Study
Lara, V. O. M.; Amaral, D. F.; Faria, D.; Vieira, L. P. – Physics Education, 2014
We use a tablet to experimentally determine the dependencies of the magnetic field (B) on the electrical current and the axial distance from a coil (z). Our data shows good precision on the inverse cubic dependence of the magnetic field on the axial distance, B?z[superscript -3]. We obtain the value of air permeability µ[subscript air] with good…
Descriptors: Measurement Techniques, Magnets, Electronic Equipment, Physics
