When a potential difference causes a current to flow in a wire, the best description of the movement of the charges is: the motion of the charge carriers is random only the electric field in the wore changes and the charges do not move all of the charge carriers in the wire move in the same direction a net displacement in the opposite direction to that of the electric field is imposed on the random motion of the valence electrons in the wire a net displacement in the direction of the electric field is imposed on the random motion of the valence electrons in the wire

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