Which Formula Should I Use for Calculating Power in an AC Circuit?

Thread starter hquang001
Start date Mar 24, 2021
Tags

Ac Ac circuit Circuit Power

Mar 24, 2021

hquang001

TL;DR Summary: When the teacher ask me to find real power of an AC Circuit, which formula should i use ?

Should i use P = V.I or P = Vrms.Irms.cosφ ?

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Mar 24, 2021

Baluncore

Science Advisor

P = Vrms.Irms.cosφ

Mar 26, 2021

alan123hk

Real or average or active power = Vrms.Irms.cosφ (W)
Instantaneous power = V.I (VA)

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