APFIVE Magnetic Field of a Moving Point Charge
A charged particle with q = +3.0 μC moves with velocity v = 4.0 × 10^5 m/s in a direction that makes an angle of 30° with the positive x-axis in the xy-plane. At a point directly above the particle (in the +z direction), the magnetic field is:
A
Perpendicular to both v and the z-axis
B
Parallel to the velocity vector
C
In the negative z-direction
D
Zero
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