The "dark" form of this phenomenon is a source of noise in image sensors.  The partial derivative of voltage with respect to time is equal to the negative of cable inductance 
The "dark" form of this phenomenon is a source of noise in image sensors.  The partial derivative of voltage with respect to time is equal to the negative of cable inductance times the partial derivative of this quantity according to the telegrapher's equations. Maxwell introduced a term symbolized J to Ampere's law to account for this quantity's displacement form.  The magnetic field created by this quantity is described by the Biot-Savart law.  Power is equal to the square of this quantity times resistance.  In Ohmic materials, this quantity is equal to voltage divided by resistance.  For 10 points, name this quantity which measures the flow of electric charge, measured in amperes.