What is a Var?

About the video

This lesson explains the concept of Volt-Ampere Reactive (VAR) and its significance in AC power systems. You’ll explore the differences between real and reactive power, understanding how VARs impact the efficiency and functionality of electrical circuits. The video uses analogies and technical explanations to illustrate how inductive and capacitive loads create reactive power, which oscillates without doing actual work. Learn how generators supply both real and reactive power, and why understanding VARs is crucial for managing power systems effectively. To get started, go to the Lesson Content tab and click on the video.

About the quiz

Each lesson contains a video, and is followed up with a simple quiz. Quizzes review information discussed within the video, with each question providing an answer justification. Helping to reinforce correct answers and helps clarify any mistakes through code citations, excerpts, and explanations, so you can better understand the material.

Charges

Charges are rewards you earn for engaging in our learning system. You receive charges for completing both the video and the quiz in each lesson. The amount of charges available for each lesson is displayed in the “Lesson Features” box on the right. The charges you earn are based on the time it takes you to complete the lesson, which is also indicated in “Lesson Features.”