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Bednarek, Stanislaw – Physics Teacher, 2018
The most common type of homopolar motor comprises a cylindrical neodymium magnet, a battery, and a non-ferromagnetic frame rotating around the battery. Here, the author substituted a coiled spring for the frame. Due to this change, a new and intriguing effect emerges, the axial buzzing of the spring during its rotation. This paper describes the…
Descriptors: Magnets, Physics, Science Instruction, Scientific Concepts
Wong, H. K. – Physics Teacher, 2009
The strong Nd[subscript 2]Fe[subscript 14]B permanent magnet has facilitated development of various fascinating yet simple homopolar motors. However, the physics of these devices is often not explained, or is explained incorrectly. A major concern is that Newton's third law was overlooked in some of the earlier articles. In this paper, I will…
Descriptors: Magnets, Motion, Physics, Science Instruction
Auty, Geoff – School Science Review, 2010
Answering some of the questions raised in the production of a previous article led to the development of a simple alternative design for the rotating wire demonstration. Significantly, this demonstration avoids the use of mercury as a conducting liquid. The attempt to explain variations in performance of another model and seeking the best…
Descriptors: Physics, Science Instruction, Demonstrations (Educational), Design
Kaneff, S. – South Australian Science Teachers Journal, 1972
Details of the generator used in a proton-synchrotron particle accelerator are described. (PS)
Descriptors: College Science, Electric Motors, Electricity, Energy