What is the critical phenomenon in superconductivity where magnetic flux lines are completely expelled from the interior of a superconductor?

💡 Solution & Explanation

The Meissner effect describes the complete expulsion of magnetic field lines from the interior of a superconducting material as it transitions into the superconducting state below a critical temperature, making it a perfect diamagnet. Photoelectric effect involves light ejecting electrons from metals, Seebeck effect generates thermoelectric voltage from temperature gradients, and Hall effect produces a transverse voltage across a conductor in a magnetic field. Superconductors are widely utilized in high-field magnetic resonance imaging scanners.