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Showing 31 to 45 of 96 results Save | Export
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Greenslade, Thomas B., Jr. – Physics Teacher, 2010
Let us now praise famous physicists, and the apparatus named after them, with apologies to the writer of Ecclesiastes. I once compiled a list of about 300 pieces of apparatus known to us as X's Apparatus. Some of the values of X are familiar, like Wheatstone and Kelvin and Faraday, but have you heard of Pickering or Rhumkorff or Barlow? In an…
Descriptors: Physics, Science Instruction, Laboratory Equipment, Science Experiments
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Evagorou, Maria; Erduran, Sibel; Mäntylä, Terhi – International Journal of STEM Education, 2015
Background: The use of visual representations (i.e., photographs, diagrams, models) has been part of science, and their use makes it possible for scientists to interact with and represent complex phenomena, not observable in other ways. Despite a wealth of research in science education on visual representations, the emphasis of such research has…
Descriptors: Science Instruction, Genetics, Epistemology, Visual Aids
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Hill, S. Eric – Physics Teacher, 2011
In a recent "TPT" article, I addressed a common miscommunication about Faraday's law, namely, that introductory texts often say the law expresses a causal relationship between the magnetic fields time variation and the electric fields circulation. In that article, I demonstrated that these field behaviors share a common cause in a time-varying…
Descriptors: Physics, Energy, Magnets, Scientific Concepts
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Hill, S. Eric – Physics Teacher, 2010
As physics educators, we must often find the balance between simplicity and accuracy. Particularly in introductory courses, it can be a struggle to give students the level of understanding for which they're ready without misrepresenting reality. Of course, it's in these introductory courses that our students begin to construct the conceptual…
Descriptors: Introductory Courses, Physics, Energy, Misconceptions
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Lund, Daniel; Dietz, Eric; Zou, Xueli; Ard, Christopher; Lee, Jaydie; Kaneshiro, Chris; Blanton, Robert; Sun, Steven – Physics Teacher, 2017
An essential laboratory exercise for our lower-division electromagnetism course involves the measurement of Earth's local magnetic field from the emf induced in a rotating coil of wire. Although many methods exist for the measurement of Earth's field, this one gives our students some practical experience with Faraday's law. The apparatus we had…
Descriptors: Research Design, Data Analysis, Engines, Science Education
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Ng, Pun-hon; Wong, Siu-ling; Mak, Se-yuen – Physics Education, 2009
In this article, we describe a simple method which can be used to measure the efficiency of a low power dc motor, a motor-converted dynamo and a coupled motor-dynamo module as a function of the speed of rotation. The result can also be used to verify Faraday's law of electromagnetic induction. (Contains 1 table and 8 figures.)
Descriptors: Energy, Science Instruction, Physics, Magnets
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Mayer , V. V.; Varaksina, E. I. – Physics Education, 2017
This paper presents a simple electromagnetic generator meant for use in students' experiments. This apparatus provides realization of a series of experiments demonstrating the principles of electricity generation and the conversion of electricity to other forms of energy with practical application. The experiments can be reproduced in a school…
Descriptors: Energy, Magnets, Science Experiments, Scientific Concepts
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Zuza, Kristina; Almudí, José-Manuel; Leniz, Ane; Guisasola, Jenaro – Physical Review Special Topics - Physics Education Research, 2014
In traditional teaching, the fundamental concepts of electromagnetic induction are usually quickly analyzed, spending most of the time solving problems in a more or less rote manner. However, physics education research has shown that the fundamental concepts of the electromagnetic induction theory are barely understood by students. This article…
Descriptors: Science Instruction, Scientific Concepts, Teaching Methods, Problem Solving
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Hong, Joon Hee; Kim, Jung Bog – Physics Teacher, 2019
Ametal leaf electroscope has often been used for teaching electrostatics. For example, Fig. 1 is a very early one demonstrating electrostatic induction with a gold leaf electroscope. Alternatively we can charge the electroscope by touching a charged object to it. In both cases, induction or charging, the metal leaves push away from each other for…
Descriptors: Science Laboratories, Laboratory Equipment, Energy, Physics
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Bostock-Smith, J. M. – Physics Education, 2008
Lenz's law is sometimes invoked to explain the behaviour of the jumping, or levitating, ring. This is shown to be incomplete, and an alternative explanation using Faraday's laws and circuit analysis is offered. This leads to the choice of optimum material and dimensions for the ring. (Contains 1 table and 4 figures.)
Descriptors: Science Instruction, Physics, Scientific Concepts, Magnets
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Akoglu, R.; Halilsoy, M.; Mazharimousavi, S. Habib – Physics Teacher, 2010
Our aim in this proposal is to use Faraday's law of induction as a simple lecture demonstration to measure the Earths magnetic field (B). This will also enable the students to learn about how electric power is generated from rotational motion. Obviously the idea is not original, yet it may be attractive in the sense that no sophisticated devices…
Descriptors: Energy, Magnets, Measurement Techniques, Scientific Principles
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Lopez-Ramos, A.; Menendez, J. R.; Pique, C. – European Journal of Physics, 2008
This paper, as its main didactic objective, shows the conditions needed for the validity of Faraday's law of induction. Inadequate comprehension of these conditions has given rise to several paradoxes about the issue; some are analysed and solved in this paper in the light of the theoretical deduction of the induction law. Furthermore, an…
Descriptors: Validity, Physics, Logical Thinking, Science Experiments
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Houari, Ahmed – Physics Education, 2007
One of the most known phenomena in physics is the Hall effect. This is mainly due to its simplicity and to the wide range of its theoretical and practical applications. To complete the pedagogical utility of the Hall effect in physics teaching, I will apply it here to determine the Faraday constant as a fundamental physical number and the number…
Descriptors: Physics, Science Curriculum, College Science, Models
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Kraftmakher, Yaakov – Physics Education, 2010
Three variants of the rotational viscometer employing a dc motor are considered. The viscometers are highly suitable for liquids of high viscosity, such as glycerol or oils (that is, for [eta] in the range 10-1000 mPa s). The set-ups are very simple and can serve as a first step to designing devices that are more complicated. Experimentation with…
Descriptors: Student Projects, Energy, Engines, Measurement Equipment
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Haugland, Ole Anton – Physics Teacher, 2014
The bicycle generator is often mentioned as an example of a method to produce electric energy. It is cheap and easily accessible, so it is a natural example to use in teaching. There are different types, but I prefer the old side-wall dynamo. The most common explanation of its working principle seems to be something like the illustration in Fig.…
Descriptors: Science Education, Teaching Methods, Power Technology, Energy Education
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