Eleven lines d. c. potential difference meter

The utility model relates to an eleven line d. c. potential difference meter, comprising a galvanometer, a first resistance wire, a second resistance wire and a third resistance wire. The length of the first resistance wire is ten meters, and the lengths of the second and the third resistance wires are both half meter. The first resistance wire leads out taps at intervals of one meter, the taps are connected with binding posts; a movable plug can be inserted in a plug jack on each binding post; an insulating tube is fixed on an insulating base, spiral grooves are distributed on the insulating tube, and the first resistance wire is wound on the insulating tube along the spiral grooves; the taps led out by the first resistance wire are uniformly arranged on the same side of the insulating tube and on the same horizontal plane with the eleven binding posts provided with plug jacks.