August 2020 issue of American Journal of PhysicsAugust 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: Blurbs, round IV by Richard Price. DOI: 10.1119/10.0001432

Editorial: Face masks and quantum mechanics. DOI: 10.1119/10.0001531


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


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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