Georgi Nadjakov created new and standard physical instruments. More of them were electrometers. He made many kind of electrometers. Four electrometers were original. He offered new method for measurement. Vera Postompirowa and Georgi Nadjakov invented new high sensibility electrometry system.

       Georgi Nadjakov found common formula about all electrometers, made by him. He constructed complex surface of a quadrant with collaborators. Dependence between deviation of a needle and potential of a quadrant was linear in the new electrometer.