Superconductivity is observed for____________?
Correct answer: B. d.c. and low frequency
- A. infrared frequencies
- B. d.c. and low frequency
- C. a.c. and high frequency
- D. frequencies having no effect
- E. none of the above
Explanation
Superconductivity is most practically observed with direct current and at low frequencies, where AC losses remain small. At higher frequencies, electromagnetic losses and penetration effects can destroy ideal superconducting behavior.
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