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In pure inductor circuit, which quantity is lagging
Current
Voltage
Both of these
None of these
Current
In a pure inductive circuit, the current lags the applied voltage by exactly 90 degrees or 2╧АтАЛ radians. This occurs because the inductor opposes any change in current, resulting in a phase shift where the voltage peak leads the current peak.
In a pure inductive circuit, the current lags the applied voltage by exactly 90 degrees or 2╧АтАЛ radians. This occurs because the inductor opposes any change in current, resulting in a phase shift where the voltage peak leads the current peak.
XLтАЛ=2╧АfL тАФ Inductive Reactance in ohms
v(t)=LdtdiтАЛ тАФ Voltage-Current relationship for an inductor
According to Faraday's Law of Electromagnetic Induction, the voltage across an inductor is given by v(t)=LdtdiтАЛ. When a sinusoidal voltage v=VmтАЛsin(╧Йt) is applied, the current i(t) becomes ╧ЙLVmтАЛтАЛsin(╧ЙtтИТ90┬░). The back-EMF generated by the change in current causes the current to be delayed relative to the voltage.
The phase angle difference is exactly 90 degrees.
The power factor of a pure inductor is zero (lagging).
Inductors store energy in the form of a magnetic field.
Average power consumed by a pure inductor over one cycle is zero.
Provides high impedance to high-frequency signals
Essential for filter and oscillator circuit design
Cannot dissipate real power
Physical inductors always possess internal resistance causing losses
AC motor starting circuits
RF tuning and frequency filtering
Transformer windings
Option B is incorrect because voltage leads the current in an inductive circuit, whereas current leads voltage only in a capacitive circuit.
The term 'lagging' refers to the time-domain peak of the current occurring after the peak of the voltage.
A is correct тАФ In a pure inductive circuit, the current waveform lags behind the applied voltage waveform by a phase angle of 90┬░.
Remember the mnemonic 'ELI the ICE man': In an Inductor (L), E leads I; in a Capacitor (C), I leads E.