Question

Meissner effect is a phenomenon of:

• A. Perfect diamagnetism
• B. Perfect paramagnetism
• C. Perfect ferromagnetism
• D. Perfect antiferromagnetism

Hint:

When a superconductor is cooled below its critical temperature, it expels all magnetic fields, thus demonstrating perfect diamagnetism, which is fundamental to magnetic levitation and many applications in the field of advanced materials.

Answer 1

The Correct Option is A

The Meissner effect describes the expulsion of magnetic fields from a superconductor when it cools below its critical temperature. Principal characteristics:
• Perfect diamagnetism: Magnetic susceptibility becomes −1.
• Superconducting state: The material achieves zero electrical resistance.
• Applications: Employed in magnetic levitation and superconducting magnets.