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Which outcome occurs regarding a Josephson junction's current when a small DC voltage is applied?

A)DC Josephson supercurrent flow occurs
B)AC Josephson oscillations begin
C)Quasiparticle tunneling is suppressed
D)Subharmonic gap structure disappears.

💡 Explanation

Applying a DC voltage generates AC Josephson oscillations because the **AC Josephson effect** dictates a frequency proportional to voltage; therefore, AC current oscillates rather than DC supercurrent, due to the applied voltage rather than the zero-voltage state.

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