In Ohm's Law, what does the letter E represent?

In Ohm's Law, the letter E represents voltage. Voltage is a measure of the electrical potential difference between two points in a circuit. It indicates how much energy is carried by electric charge in a system and is critical for understanding how current flows through electrical components. Ohm's Law itself is commonly expressed as V = I × R, where V is voltage (E), I is current, and R is resistance. This foundational relationship describes how voltage, current, and resistance interact in electrical circuits, emphasizing that voltage is the driving force that pushes electric charges through a conductor.

Understanding this concept is essential for anyone studying electrical engineering or working with electrical systems, as it forms the basis for analyzing and troubleshooting circuits. The other terms, such as energy, electrons, and resistance, relate to electrical concepts but do not represent voltage within the framework of Ohm's Law. Energy is typically associated with the capacity to do work, electrons are the charge carriers in a wire, and resistance quantifies how much the material opposes the flow of current.