(Journal Article) Michael P. McCaughey creator text Washington , DC American Association of Physics Teachers September 2023 monographic eng

print

525–527 p. Abstract- An object floating in midair underneath an electromagnet is intriguing and mysterious. Students love it, though anyone who has worked with this system soon realizes that the system is only stable over a limited region of space. But why is the system stable in the first place? This paper presents an investigation of the instability of magnetically suspended systems beginning with the simple, and going deeper, leading finally to a computer-controlled solution. The analysis is suitable for use in a college-level introductory physics course in that it relates to the study of damped simple harmonic oscillators. I describe construction of an Arduino-based magnetic levitation apparatus, programs to operate it, and a new procedure for deriving the tuning constants. ***______{For Hard Copy, Please visit Library.}________*** Light emitting diodes, Transistors, Circuit theorems Control equipment, Harmonic oscillator Computer programming, Magnetic levitation devices Resistors, Magnetic materials, Educator 530.071 0031-921X RIEBPL Library https://doi.org/10.1119/5.0018830 https://doi.org/10.1119/5.0018830 231106 20231120112108.0