阿摩線上測驗
56. It is known that the magnetic field of 0.17 T can cause an
ion to move in a circular orbit of radius 2 m. Find the radius of circular orbit of a
ion with identical velocity in the same magnetic field. (Ion moves in direction perpendicular to the magnetic field.)
(A) 0.12 m
(B) 0.25 m
(C) 0.34 m
(D) 0.52 m
(E) 0.72 m
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統計： A(2), B(0), C(1), D(1), E(35) #2751671
統計： A(2), B(0), C(1), D(1), E(35) #2751671
