Which of the following is the acronym for electromotive force?

The acronym for electromotive force is represented as "E." This notation is widely used in electrical engineering and physics to denote the electromotive force generated in a circuit, which is essentially the voltage produced by a source, such as a battery or generator. This force is responsible for pushing electric charge through a circuit and is a critical concept in understanding how electrical systems function.

The other choices represent different electrical concepts; "V" typically stands for voltage, which is the measurement of electric potential difference, "I" stands for current, which is the flow of electric charge, and "R" represents resistance, which is the opposition to the flow of current in a circuit. Understanding these distinctions is essential for grasping the fundamental principles of electricity and circuit theory.