AVIXA Recognized AV Technologist Test 2025 – 400 Free Practice Questions to Pass the Exam

In Ohm's Law, voltage is represented by the variable "E," which stands for electromotive force (EMF). This fundamental relationship in electrical theory states that voltage (E), current (I), and resistance (R) are interrelated through the equation E = I × R. This means that for a given resistance in a circuit, the voltage is directly proportional to the current flowing through that resistance while guiding the understanding of how circuits function.

Understanding this relationship is critical for analyzing and designing electrical circuits effectively, as voltage drives current through a resistive element. The other options do not represent voltage: "W" denotes power, which is a function of both voltage and current; "P" also refers to power; and "I" represents current itself. Recognizing "E" as the correct representation for voltage in Ohm's Law is essential for mastering the concepts of electrical circuits.