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← ScienceWhich outcome occurs when a Josephson junction is cryogenically cooled and a DC bias voltage is applied?
A)Cooper pairs tunnel through the barrier✓
B)Junction temperature reaches critical point
C)Electrons exhibit increased ohmic resistance
D)Magnetic flux creates quantized vortices
💡 Explanation
Tunneling of Cooper pairs through the insulating barrier occurs because the superconducting state enables paired electrons to tunnel as a unit, rather than individually thereby producing a supercurrent across the junction; therefore, a supercurrent flows, rather than resistance effects.
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