In each of six electric motors, a cylindrical coil with N turns and radius r is immersed in a magnetic field of magnitude B. The current in the coil is I. Rank the motors in order of the maximum torque on the coil, greatest to smallest.

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(a) (b) (c) (d) (e) (f) N = 100, r = 2 cm, B = 0.4 T, I = 0.5 A N = 100, r = 4 cm, B = 0.2 T, I = 0.5 A N = N = 75, r = 2 cm, B = 0.4 T, I = 0.5 A 50, r = 2 cm, B = 0.8 T, I = 0.5 A 100, r = 3 cm, B = 0.4 T, I = 0.5 A N = N = 50, r = 2 cm, B = 0.8 T, I = 1 A