A Conducting Rectangular Loop of Mass M,resistance R,and Dimensions a ×

Multiple Choice

A conducting rectangular loop of mass M,resistance R,and dimensions a × b is allowed to fall from rest through a uniform magnetic field which is perpendicular to the plane of the loop.The loop accelerates until it reaches a terminal speed (before the upper end enters the magnetic field) .If a = 2.0 m,B = 6.0 T,R = 40 Ω,and M = 0.60 kg,what is the terminal speed?

A) 1.6 m/s
B) 20 m/s
C) 2.2 m/s
D) 26 m/s
E) 5.3 m/s