Task: Text Categorization
Input (English): One of the "Golden Rules" for operational amplifiers states that this quantity is the same at both inputs of an op-amp. Norton's Theorem states that some electrical circuits can be simplified to a resistor and a source of this in parallel. Kirchhoff's Node Rule states that the sum of this quantity entering and leaving a junction must equal(*) zero. Maxwell names a correction factor for the displacement type of this quantity in Ampere's Law. For 10 points, name this quantity equal to voltage divided by resistance in Ohm's Law, symbolized I, and measured in amps.
Output (English): Science