Question
Download Solution PDFWhich of the following statements is NOT correct about active power in an AC circuit?
Answer (Detailed Solution Below)
Detailed Solution
Download Solution PDFPower in an electrical circuit
1.) Active Power:
\(P=VIcos\phi\)
Active power is the power dissipated in the pure resistance. It is measured in terms of kilowatts (kW).
2.) Reactive Power:
\(Q=VIsin\phi\)
Reactive power is the power dissipated in the pure inductor or capacitor. It is measured in terms of Var.
3.) Apparent Power:
\(S=\sqrt{P^2+Q^2}\)
It is measured in KVA.
Power Triangle
The power factor is given by:
\(cosϕ={P\over S}\)
where, cosϕ = Power factor
P = Active power
Q = Reactive power
Last updated on Jun 16, 2025
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