Electromagnetic Induction and Alternating Currents: JEE Main 2026 Physics question

$XPQY$ is a vertical smooth long loop having a total resistance $R$ where $PX$ is parallel to $QY$ and separation between them is $l$. A constant magnetic field $B$ perpendicular to the plane of the loop exists in the entire space. A rod $CD$ of length $L$ ($L>l$) and mass $m$ is made to slide down from rest under the gravity as shown in figure. The terminal speed acquired by the rod is ______ m/s. ($g$ = acceleration due to gravity)