The Four Wire Loops Shown Have Edge Lengths of Either

Multiple Choice

The four wire loops shown have edge lengths of either L, 2L, or 3L. They will move with the same speed into a region of uniform magnetic field directed out of the page. Rank them according to the maximum magnitude of the induced emf, least to greatest.

A) 1 and 2 tie, then 3 and 4 tie
B) 3 and 4 tie, then 1 and 2 tie
C) 4, then 2 and 3 tie, then 1
D) 1, then 2 and 3 tie, then 4
E) 1, 2, 3, 4