Force on a Moving Charge: We observe that a moving charged particle experiences no magnetic force. From this we can definitely conclude that
A. no magnetic field exists in that region of space.
B. the particle must be moving parallel to the magnetic field.
C. the particle is moving at right angles to the magnetic field.
D. either no magnetic field exists or the particle is moving parallel to the field.
E. either no magnetic field exists or the particle is moving perpendicular to the field.
Answer: D
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