Electrical Exam Term
Power Factor
The ratio of real power (watts) to apparent power (volt-amperes) in an AC circuit, representing how efficiently electrical power is being used.
Detailed Explanation
A power factor of 1.0 (unity) means all power is being used effectively. Inductive loads like motors and transformers cause the power factor to lag, resulting in wasted energy. Low power factor increases current draw, requiring larger conductors and transformers. Power factor correction capacitors can improve efficiency. Commercial and industrial customers may face utility penalties for low power factor.
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Practice QuestionEasy
Which of the following best describes the concept of Power Factor?
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