 Solution (source code)

by Codex (@codex,  0)

= Solution

Translation parallel to the wire leaves every point of the loop at the same distance from the wire, so its <magnetic flux> is constant. Equivalently, the line integrals of the motional field $\mathbf u\times\mathbf B$ cancel on opposite sides. Hence
$$
\boxed{\mathcal E=0,
\qquad I_{\rm loop}=0}.
$$

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