Physics · Electromagnetic Induction

XPQY is a vertical smooth long conducting loop having a total resistance R, where PX is parallel to QY and the separation between them is l. A constant uniform magnetic field B exists perpendicular to the plane of the loop. A rod CD of length L (L > l) and mass m slides down from rest under gravity while maintaining contact with the loop. The terminal speed acquired by the rod is ________ m/s. (g = acceleration due to gravity)