Measurement shunt with compensation for induced error voltages

A measurement shunt comprising:

• a resistance formed from a plate of electrically conductive material, first and second current terminals, and first and second voltage terminals disposed on a common edge of the plate at spaced apart points thereon, the resistance providing between the first and second voltage terminals a voltage representative of an electric current applied to the shunt at the current terminals and passing through the resistance;
• and
• inductor means for developing a stray variable magnetic field induced voltage that is equal in magnitude and opposite in polarity to any stray variable magnetic field induced error voltage in said plate, the inductor means comprising at least one open loop formed of an electrically conductive material and having first and second ends disposed respectively in the vicinity of the first and second voltage terminals, the loop extending from its first and second ends toward the interior of the surface of the plate in a plane substantially parallel to and adjacent the plate, electrical insulation means between said inductor means and said plate, the inductor means being connected electrically in series with a path in the plate via said voltage terminals and between first and second measurement terminals, the inductor means providing, in the presence of a variable magnetic field, an induced voltage compensating for the voltage induced in the resistance by such magnetic field, such that a voltage free of induced error voltrage appears between the measurement terminals.