A 8.45-micro C particle with a mass of 6.15 × 10⁻⁵ kg moves perpendicular to a 0.493-T magnetic field in a circular path of radius 34.1 m. How much time will it take for the particle to complete one:
a) 2.67 s
b) 3.42 s
c) 1.87 s
d) 4.29 s