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Did you mean diane AND current?
Showing 1 to 15 of 26 results Save | Export
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Önder, Fatih; Önder, Esra Bìlal; Ogur, Mehmet – Physics Teacher, 2019
In a classical electronic laboratory, there is an experiment where a diode is connected in a series with a resistor and a variable DC voltage source in order to draw the characteristic I-V curve of the diode. Input voltage is gradually increased starting from 0 V, and the potential difference between the diode's terminals is read by using a…
Descriptors: Physics, Electronics, Science Experiments, Energy
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Regester, Jeffrey – Physics Teacher, 2016
A bridge rectifier is a diamond-shaped configuration of diodes that serves to convert alternating current(AC) into direct current (DC). In our world of AC outlets and DC electronics, they are ubiquitous. Of course, most bridge rectifiers are built with regular diodes, not the light-emitting variety, because LEDs have a number of disadvantages. For…
Descriptors: Light, Lighting, Electronics, Science Experiments
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Wagner, Eugene P., II – Journal of Chemical Education, 2016
A student laboratory experiment to investigate the intrinsic and extrinsic bandgaps, dopant materials, and diode design in light-emitting diodes (LEDs) is presented. The LED intrinsic bandgap is determined by passing a small constant current through the diode and recording the junction voltage variation with temperature. A second visible…
Descriptors: Light, Electronics, College Science, Science Instruction
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Kamata, Masahiro; Yajima, Seiko – Journal of Chemical Education, 2013
An educational experiment illustrates the electrolysis of water and copper chloride to middle school science students. The electrolysis cell is composed of filter paper soaked with Na[subscript 2]SO[subscript 4] or CuCl[subscript 2] aqueous solution sandwiched, along with a sheet of platinum foil, between two coin-type lithium batteries. When the…
Descriptors: Science Instruction, Chemistry, Science Laboratories, Middle Schools
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Ocaya, R. O.; Dejene, F. B. – European Journal of Physics, 2007
This paper presents a straightforward but interesting experimental method for p-n diode characterization. The method differs substantially from many approaches in diode characterization by offering much tighter control over the temperature and current variables. The method allows the determination of important diode constants such as temperature…
Descriptors: Climate, Science Experiments, Chemistry, Science Instruction
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Kamata, Masahiro; Paku, Miei – Journal of Chemical Education, 2007
Current regulative diodes (CRDs) are applied to develop new educational experiments on Faraday's law by using a zinc-air battery (PR2330) and a resistor to discharge it. The results concluded that the combination of zinc-air batteries and the CRD array is simpler, less expensive, and quantitative and gives accurate data.
Descriptors: Chemistry, Science Experiments, Science Instruction, Equipment
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Planinšic, Gorazd; Etkina, Eugenia – Physics Teacher, 2014
LEDs, or light-emitting diodes, are cheap, easy to purchase, and thus commonly used in physics instruction as indicators of electric current or as sources of light (Fig. 1). In our opinion LEDs represent a unique piece of equipment that can be used to collect experimental evidence, and construct and test new ideas in almost every unit of a general…
Descriptors: Science Instruction, Physics, Light, Energy
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Cesin-AbouAtme, Tania; Lopez-Almeida, CelesteG.; Molina-Labastida, Geronimo; Ibanez, Jorge G. – Journal of Chemical Education, 2021
Due to social distancing constraints during the COVID-19 pandemic, several experiments were designed in the Fall 2020 and Spring 2021 semesters in our Electrochemistry and Corrosion elective course to demonstrate electrochemical phenomena and applications at the students' homes with a kit sent by the school. We report here a student-designed…
Descriptors: Light, Energy, Magnets, Science Experiments
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Organtini, Giovanni – Physics Teacher, 2012
In introductory physics textbooks, diodes working principles are usually well described in a relatively simple manner. According to our experience, they are well understood by students. Even when no formal derivation of the physics laws governing the current flow through a diode is given, the use of this device as a check valve is easily accepted.…
Descriptors: Physics, Electronic Equipment, Textbooks, Science Instruction
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Waltham, N. R.; And Others – Physics Education, 1981
Describes the use of silicon diodes for low temperature thermometry in the teaching laboratory. A simple and inexpensive circuit for display of the diode forward voltage under constant current conditions is described, and its application in the evaluation of low cost silicon diodes as low temperature thermometers is presented. (SK)
Descriptors: College Science, Higher Education, Physics, Science Education
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Ocaya, R. O.; Luhanga, P. V. C. – European Journal of Physics, 2011
It is shown that the well-known linear variation of p-n diode terminal voltage with temperature at different fixed forward currents allows easy and accurate determination of the semiconductor ideality factor and bandgap from only two data points. This is possible if the temperature difference required to maintain the same diode voltage drop can be…
Descriptors: Physics, Laboratories, Climate, Undergraduate Study
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Pulay, Alana; Williamson, Amy – Learning Environments Research, 2019
Studies suggest that the learning environment can act as a third teacher in contributing towards student academic success. A variable within the physical learning environment that has received little attention in the literature is the interior lighting. Because of budget constraints and age, most American public school classrooms have fluorescent…
Descriptors: Classroom Environment, Lighting, Learner Engagement, Student Behavior
Hurtado, Marco; Rosenbaum, Fred J. – 1971
As part of a study of the application of communication satellites to educational development, certain technical aspects of such a system were examined. A current controlled bistable switching element using a CW Gunn diode is reported on here. With modest circuits switching rates of the order of 10 MHz have been obtained. Switching is initiated by…
Descriptors: Communications Satellites, Electric Circuits, Electromechanical Technology, Electronics
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RayChaudhuri, Barun – European Journal of Physics, 2011
This work demonstrates an experiment on the optoelectronic properties of a p-n junction suitable for students of undergraduate physics. It investigates, from an educational point of view, the origin of the wavelength of radiation emitted by a light emitting diode (LED) and determines the emission wavelength of an infrared LED without using…
Descriptors: Physics, Radiation, Laboratories, Science Instruction
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Azooz, A. A. – European Journal of Physics, 2007
Additional information concerning the energy distribution function of electrons in a magnetron diode valve can be extracted. This distribution function is a manifestation of the effect of space charge at the anode. The electron energy distribution function in the magnetron is obtained from studying the variation of the anode current with the…
Descriptors: Energy, Higher Education, Undergraduate Students, Physics
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