Zero resistance: Superconductivity basics

This lecture covers the fundamental concepts of superconductivity, including zero electrical resistance, expulsion of magnetic fields, and the absence of electric fields inside a superconductor. It explains the proof of persistent currents, the phase transition to superconductivity, and the applications of superconducting magnets for power generation. The instructor discusses the critical current, proximity effect, and the limits of zero resistance in superconductors. Additionally, the lecture explores the use of fault current limiters in practice, highlighting the resistive type FCL and its applications in the power grid.