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Experimental principle of hall effect in college physics
Hall effect: the phenomenon that a conductor or semiconductor with current is placed in a magnetic field perpendicular to the direction of current, and a potential difference is generated on both sides of an object perpendicular to the direction of current and magnetic field. In fact, it can be deduced by the left-handed rule that electrons deflect on one side of the plate and are positively charged on the other side, thus forming a potential difference.