The Hall Voltage is the potential created across a current-carrying metal-strip when the strip is placed in a magnetic field perpendicular to the current flow in the strip. It is used as a research tool to probe the movement of charges in materials, as well as determining the blood flow rate. One fundamental use of the Hall effect is the determination of the charge of the charge carriers. What of the following statements is true concerning the strips with a positive versus a negative Hall voltage? A) The top strip has positive charge carriers, and the electric field points in the same direction as the electric force.
B) The bottom strip has positive charge carriers, and the electric field and electric force point in the same direction.
C) The top strip has negative charge carriers, which get deflected to the top of the plate.
D) The bottom strip has negative charge carriers, and the magnetic force points upward along the plate.