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The value of power factor in pure inductor circuit is
0
1
тИЮ
VI
0
In a purely inductive circuit, the current lags behind the applied voltage by an angle of 90┬░. Since the power factor is defined as the cosine of the phase angle difference between voltage and current, cos(90┬░)=0.
In a purely inductive circuit, the current lags behind the applied voltage by an angle of 90┬░. Since the power factor is defined as the cosine of the phase angle difference between voltage and current, cos(90┬░)=0.
P=VIcos(╧Х) тАФ Formula for real power
╧Х=90┬░ тАФ Phase angle for pure inductor
In an ideal inductor, the voltage v(t)=LdtdiтАЛ leads the current by 90┬░ because the opposition to change in current is purely reactive. As there is no resistance, no real power is dissipated (true power is zero), and the entirety of the energy oscillates between the source and the inductor's magnetic field. This phase shift of ╧А/2 radians results in a power factor of zero, characterizing the circuit as purely reactive.
Pure inductor consumes zero real power (Active Power P = 0).
It only exchanges reactive power (VAR) with the supply.
The power factor is always lagging in inductive circuits.
The current is purely reactive, represented as I=ImтАЛsin(╧ЙtтИТ90┬░).
Used in energy storage (magnetic field).
Fundamental building block for filters and oscillators.
Causes lagging power factor in transmission lines.
Increases current requirement for a given real power demand.
Induction motors
Transformers
Chokes in fluorescent lighting
Option B (1) represents a purely resistive circuit.
Option C (тИЮ)is physically impossible for power factor.
The range of power factor is always between 0 and 1.
A is correct тАФ The phase difference between voltage and current in a pure inductor is 90┬░, leading to a power factor of cos(90┬░)=0.
Remember: 'ELI the ICE man'. ELI means in an Inductor (L), current (I) lags voltage (E). ICE means in a Capacitor (C), current (I) leads voltage (E).