An electron moving perpendicular to a uniform magnetic field of 0.22 T moves in a circle with a speed of 1.5 x 10 m/s. What is the radius of the circle? (e - 1.60 x 10 19 C. mdectron 9.11 x 10 1kg) O 22 mm O0.39 mm 0 15 min O 0.22 mm 03.9 mm
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