3 papers
physics.class-ph2023
A Steady Loop Current Does Not Radiate
Shengchao Alfred Li, Charlotte Jingyang Li
According to classical electrodynamics, a steady loop current does not radiate. Edward, Kenyon, and Lemon show that the present-time approximation of the retarded electric field (t…
physics.class-ph2023
Jefimenko Made Easy: Electromagnetic Fields through Retardation
Shengchao Alfred Li
Oleg D. Jefimenko's electrodynamics textbook is unique in its approaches to deriving the electric and magnetic fields of arbitrary charge and current distributions and of an arbitr…
physics.pop-ph2015
An Experiment About Parallel Circuit And The Lorentz Forces On Wires
Audrey Yueru Li, Shengchao Alfred Li
Parallel circuit and the Lorentz forces on current carrying wires are important concepts in introductory physics courses. Here we describe an experiment that illustrates these two…