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Which outcome is observed regarding electron flow when two isolated metallic conductors are brought nanoscopically close?

A)Current flows without applied voltage.
B)Resistance approaches infinity asymptotically.
C)Resistance is independent of separation.
D)Thermionic emission current strongly dominates.

💡 Explanation

Current flows because quantum tunneling permits electrons to cross the classically forbidden gap; the mechanism is quantum-mechanical tunneling. Therefore, a non-zero current is observed, rather than infinite resistance without electron states within the gap.

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