Initially at Rest,a Small Copper Sphere with a Mass of 2.0

Initially at rest,a small copper sphere with a mass of 2.0 * 10^-6 kg and a charge of 3.0 *10^-4 C is accelerated through a 5000 V potential difference before entering a region with a 4.0 T magnetic field that is directed perpendicular to the its velocity.What is the radius of curvature of the copper sphere's motion in the magnetic field region?

A) 2.0 m
B) 4.1 m
C) 8.3 m
D) 650 m
E) 1300 m

Correct Answer:

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