For 10 points—what is this effect, named after the 1973 Nobel Prize winner in physics?
First predicted in 1962, it will not occur in the presence of an electromotive force, and can be used to measure weak magnetic fields. Quantum mechanics predicts that electrons, in Cooper pairs, can [*] tunnel across a thin insulating layer between two superconductors.  For 10 points—what is this effect, named after the 1973 Nobel Prize winner in physics?
First predicted in 1962, it will not occur in the presence of an electromotive force, and can be used to measure weak magnetic fields.
Josephson effect or current or tunneling