Discussion
Which statement about a good conductor is NOT correct?
Answer: C
Correct answer: the electric and magnetic fields within it are in phase
That is the false one. Because the intrinsic impedance of a good conductor carries a 45 degree phase angle, the magnetic field lags the electric field by 45 degrees inside the metal. The other three are all correct: the 45 degree angle itself, the decay to \( 1/e \) - about a third - in one skin depth, and the equality \( \alpha = \beta = 1/\delta \).
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