A 34.5 cm wire carrying a current of 12.0 A passes through a magnetic field of 2.35 x 102 T. (a) What is the maximum force exerted on the wire?
F = B I L
L = 0.345 m
B = 235 T
I = 12.0 A
Answer F will be in Newtons.
You get the maximum force when the wire and the B-field are perpendicular.