Which outcome occurs in a Josephson junction when increasing the thickness of the insulating barrier?

💡 Explanation

When the thickness of the insulating barrier increases, the quantum tunneling probability decreases exponentially because the wavefunction's amplitude attenuates rapidly with distance through the barrier, reducing the supercurrent flow. Therefore, the critical current decreases exponentially, rather than capacitance increasing which is inversely proportional to the thickness, or other changes.

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