Final answer:
When a wire moves through a magnetic field, an electric current is produced due to electromagnetic induction. The direction of the current depends on the relative motion between the wire and the magnetic field.
Step-by-step explanation:
When a wire moves through a magnetic field, an electric current is produced in the wire due to the phenomenon of electromagnetic induction. This occurs because the magnetic field induces a force on the charged particles in the wire, causing them to move. The direction of the induced current depends on the relative motion between the wire and the magnetic field, and is determined by Fleming's Right-Hand Rule.
As the wire moves through the magnetic field, the magnetic field exerts a force on the charged particles in the wire, which in turn causes them to move. This movement of charged particles constitutes an electric current in the wire.
Therefore, the correct option is D. The negative charges and positive charges in the wire are pushed in opposite directions by the magnetic field, resulting in the production of an electric current.
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