What is the term used for the product of voltage and current in electrical systems?

The product of voltage and current in electrical systems is defined as "apparent power," which is measured in volt-amperes (VA). This term refers to the combination of real power, which is the actual power consumed by the load to perform work, and reactive power, which is needed to maintain the magnetic and electric fields in certain types of equipment, such as motors and transformers.

Apparent power gives a complete picture of the energy flow in an electrical system, incorporating both the power that does useful work and the power that sustains reactive elements. It is essential in AC (alternating current) systems where the current and voltage may not be in phase. The phase difference between voltage and current affects how much of the apparent power is converted into real power versus being oscillated back and forth as reactive power.

This understanding of apparent power is crucial for linemen and electrical professionals, as it aids in analyzing the efficiency and performance of electrical systems, ensuring they operate optimally and safely.