August 2020 Issue,
Volume 88, No. 8
Demonstration of the lateral AC skin effect using a pickup coil
We present a simple demonstration of the skin effect by observing the current distribution in a wide rectangular strip conductor driven at frequencies in the 0.25–5 kHz range. We measure the amplitude and phase of the current distribution as a function of the transverse position and find that they agree well with numerical simulations: The current hugs the edges of the strip conductor with a significant variation in phase across the width. The experimental setup is simple, uses standard undergraduate physics instructional laboratory equipment, and is easy to implement as a short in-class demonstration. Our study is motivated by modeling ac magnetic near fields in the vicinity of a rectangular trace on an atom chip.
EDITORIAL
Editorial: Blurbs, round IV by Richard Price. DOI: 10.1119/10.0001432
Editorial: Face masks and quantum mechanics. DOI: 10.1119/10.0001531
PAPERS
Diffusion as a first model of spread of viral infection by Paulo H. Acioli. DOI: 10.1119/10.0001464
A simple graphical method for calculating the standing wave frequencies on a rectangular membrane by Joseph D. Romano and Richard H. Price. DOI: 10.1119/10.0001299
The sonorous beat of optical waves in a Michelson interferometer by Matthias Büchner and Jean-Philippe Loisel. DOI: 10.1119/10.0001208
An undergraduate experiment to illustrate spatial transfer function concepts in Fourier optics by Jérôme Salvi, Gil Fanjoux, Anne Boetsch and Remo Giust. DOI: 10.1119/10.0001319
Dynamic trajectory and parametric resonance in coupled pendulum-beam system by Xinghong Fu. DOI: 10.1119/10.0001389
Dirac's classical-quantum analogy for the harmonic oscillator: Classical aspects in thermal radiation including zero-point radiation by Timothy H. Boyer. DOI: 10.1119/10.0001406
Surface charges from a sensing pixel perspective by Maurice M. Klee. DOI: 10.1119/10.0001435
On the Wiener optical method to study molecular diffusion in liquids by Jean-Marc Roussel, Marc Gailhanou, Alexandre Larrivé, Luis Montero, Margaux Zaffran and Claude Torregrosa. DOI: 10.1119/10.0001448
INSTRUCTIONAL LABORATORIES AND DEMONSTRATIONS
Terrella for advanced undergraduate laboratory by J. C. Reardon, A. F. Almagri, N. Christensen, D. A. Endrizzi, C. B. Forest, S. Gallogly, A. Lambert, S. Malewicz, J. Milhone, P. D. Nonn, M. D. Nornberg, S. P. Oliva and C. Purcell. DOI: 10.1119/10.0001318
Demonstration of the lateral AC skin effect using a pickup coil by Anne E. Blackwell, Andrew P. Rotunno and Seth Aubin. DOI: 10.1119/10.0001272
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