A Proton Moves Around a Circular Path (Radius = 2

Multiple Choice

A proton moves around a circular path (radius = 2.0 mm) in a uniform 0.25-T magnetic field.What total distance does this proton travel during a 1.0-s time interval? (m = 1.67 *10 ^{- 27} kg,q = 1.6 *10 ^{- 19} C)

A) 82 km
B) 59 km
C) 71 km
D) 48 km
E) 7.5 km