Solution to 1992 Problem 34

The boundary conditions for time-varying electric and magnetic fields at the surface of a perfect conductor are:
\begin{align*}E_t &= 0 \\E_n &= \frac{\rho_s}{\epsilon_0} \\\left|B_t \right| &= \mu_0 \left| J_{s} \right| \\B_n...
where J_s is the surface current density and \rho_s is the surface charge density. From this it immediately follows that only answer (D) is correct.

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