Question
Download Solution PDFWhen an inductive load is connected, the power factor is:
Answer (Detailed Solution Below)
Detailed Solution
Download Solution PDF- The overall power factor is defined as the cosine of the angle between the phase voltage and phase current.
- In AC circuits, the power factor is also defined as the ratio of the real power flowing to the load to the apparent power in the circuit.
- Hence power factor can be defined as watts to volt-amperes.
Power factor = cos ϕ
ϕ is the angle between the voltage and the current.
- For a purely resistive circuit, the angle between the voltage and current is 0°
So power factor for a purely resistive circuit is:
P.F. = cos 0°
P.F. = 1 (unity)
- In a purely inductive circuit, the current lags the voltage by 90° and the power factor is zero lagging
- In a purely capacitive circuit, the current leads the voltage by 90° and the power factor is zero leading
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