Question

In a superconductor the value of critical density depends upon

• A. magnetic field strength
• B. temperature
• C. either A or B
• D. Both A and B

Answer 1

The correct option is D Both A and B

Superconductivity is characterize, both by perfect conductivity and by the expulsion of magnetic field (Meissner effect.)

$\therefore$ Change in either magnetic field strength or temperature can change the superconductivity to normal matter.