Which letter(s) represent voltage in electrical equations?

Voltage in electrical equations is represented by the letters E and V. This stems from the fact that 'E' often stands for electromotive force (EMF), which quantifies the energy provided by a source of electrical energy per charge, while 'V' is a widely accepted symbol for voltage in many electrical engineering contexts. Voltage is a critical parameter in electrical circuits, as it drives the flow of current through resistors and other components. Understanding that E and V signify voltage helps in analyzing circuits effectively, whether in calculating potential differences or in applying Ohm’s Law.