What does the symbol E represent in Ohm's Law?

In the context of Ohm's Law, the symbol E represents voltage. Ohm's Law establishes the relationship between voltage, current, and resistance in an electrical circuit, often expressed as the formula V = IR. Here, "V" is used for voltage, "I" for current, and "R" for resistance.

Voltage is the electrical potential difference that drives current through a circuit. It can be thought of as the force that pushes electric charges through a conductor, enabling the flow of current. Understanding the role of voltage is crucial in circuit analysis, as it directly affects how current behaves in response to changes in resistance and voltage levels.

The other terms like resistance, current, and power have their own specific symbols in electrical engineering, which helps to differentiate their roles in the principles governing electric circuits. Resistance is indicated by R, current by I, and power typically denoted by P. Hence, recognizing that E symbolizes voltage is fundamental to grasping the core concepts of Ohm's Law and electrical circuits as a whole.