##### 54. A region shown below contains a perfect co...

54. A region shown below contains a perfect conducting half-space and air. The surface current $\overrightarrow {K_s}$  on the surface of the perfect conductor is s $\overrightarrow {K_s}=\widehat x2$ amperes per meter. The tangential  $\overrightarrow H$ 
field in the air just above the perfect conductor is

(A) $(\widehat x+\widehat z)2$ amperes per meter

(B) $\widehat x2$ amperes per meter

(C) $-\widehat z 2$ amperes per meter

(D) $\widehat z2$ amperes per meter

Hint:

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