About the video
This lesson focuses on calculating reactive power (VAR) and its effects on power systems. You’ll learn how loads draw real and reactive power, and the importance of power factor in electrical efficiency. The video explains how adding capacitors can improve power factor by reducing net reactive power (kVARs). It also clarifies common misconceptions about energy savings and the differences between real power (kilowatts) and apparent power (kVA). By understanding these calculations, you’ll be better equipped to size equipment accurately and optimize power system performance. 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.”