{c}

Online text: https://openstax.org/books/university-physics-volume-3/pages/9-8-superconductivity

Cited passages: §9.8, Eq. (9.38) and the argument that zero resistivity conserves existing flux rather than expelling it; §9.8, Properties of Superconductors, paragraphs distinguishing type I, type II and their two critical fields; §9.8, type-II critical-field and mixed-state paragraphs; the source uses B_c1 and B_c2 for applied-field scales.


 9.8 Superconductivity (source code)