An uncharged metal sphere is placed on an insulating puck on a frictionless table. While being held parallel to the table, a rod with a charge q is brought close to the sphere, but does not touch it. As the rod is brought in, the sphere
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remains at rest.
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moves toward the rod.
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moves away from the rod.
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moves perpendicular to the velocity vector of the rod.
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moves upward off the puck.