Magnetic Field of a Long Wire: A negatively charged particle -Q is moving to the right, directly above a wire having a current I flowing to the right, as shown in the figure. In what direction is the magnetic force exerted on the particle due to the current?
A. into the page
B. out of the page
C. downward
D. upward
E. The magnetic force is zero because the velocity is parallel to the current.
Answer: D
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