Q. Which one of the following is correct with reference to the “Meissner effect”, seen in the news recently?

[A] It refers to the resistance of a superconductor at low temperature.

[B] It is the expulsion of magnetic flux from the interior of a superconductor.

[C] It is the increase in electrical conductivity with temperature in certain materials.

[D] It refers to the ability of a material to generate a magnetic field.

Answer: B
Notes:

Explanation – The Meissner effect is a phenomenon that occurs in superconductors, which are materials that can conduct electricity with zero resistance at very low temperatures. When a superconductor is cooled below its critical temperature, it expels any existing magnetic fields from its interior, creating a magnetic shield around itself. This is known as the Meissner effect.

Source: Forum IAS

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