Magnetic Field of a Moving Charge
A proton with charge q moves with velocity v in the positive x-direction. The magnitude of the magnetic field produced by the proton is greatest at which of the following locations?
A
At the origin where the proton is located
B
At all points equidistant from the proton
C
Along the x-axis in front of the proton
D
Along the y and z axes, equidistant from the proton
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