When an observer moves past a stationary electric charge, she detects

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When an observer moves past a stationary electric charge, she detects both an electric and a magnetic field because the electric field produces a magnetic field and vice versa. This phenomenon is known as electromagnetic induction. The relative strength of the electric and magnetic fields depends on the observer's speed and the distance from the charge. Therefore, both fields may be detected, but their relative strengths vary.

When an Observer Moves Past a Stationary Electric Charge, She