FIGURE 29-7 -Fig. 29-7 Shows 3 Metallic Frames Labeled A, B, and A

FIGURE 29-7
-Fig. 29-7 shows 3 metallic frames labeled A, B, and C heading towards a region where a uniform magnetic field exists. The frames move with the same constant velocity. Their relative sizes are indicated by the background grid. As they enter the magnetic field the frames will have an induced electric current along their perimeter. For which frame will the current be the greatest?

A) A
B) B
C) C
D) The current is the same in all 3 cases.
E) There is no induced current when the frames move at constant speed.