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