Alternating Current
Power in AC Circuit: The Power Factor
The power is defined as the rate at which work is being in the circuit.
The average power in an AC circuit,
Pav = Vrms irms cos θ
= \frac{V}{\sqrt{2}} \frac{i}{\sqrt{2}} \cos \theta = \frac{Vi}{2} \cos \theta
Where \cos \theta = \tt \frac{Resistance (R)}{Impedance (Z)} is called the power factor of AC Circuit.
View the Topic in this video From 31:38 To 59:00
Disclaimer: Compete.etutor.co may from time to time provide links to third party Internet sites under their respective fair use policy and it may from time to time provide materials from such third parties on this website. These third party sites and any third party materials are provided for viewers convenience and for non-commercial educational purpose only. Compete does not operate or control in any respect any information, products or services available on these third party sites. Compete.etutor.co makes no representations whatsoever concerning the content of these sites and the fact that compete.etutor.co has provided a link to such sites is NOT an endorsement, authorization, sponsorship, or affiliation by compete.etutor.co with respect to such sites, its services, the products displayed, its owners, or its providers.
A voltage v = vm sin ωt applied to a series RLC circuit drives a current in the circuit given by i = im sin (ωt + Φ) where
i_{m} = \frac{v_{m}}{Z} \ {\tt and} \ \phi = \tan^{-1} \frac{X_{C} - X_{L}}{R}