In an $$AC$$ circuit, the power factor
Power factor, $$\displaystyle\cos \phi=\frac{R}{Z}$$
When circuit contains only resistance, then
$$Z=R$$
$$\therefore \displaystyle \cos\phi=1$$
When circuit contains only inductance, then
$$R=0$$
$$\therefore \displaystyle \cos\phi=0$$
For the LCR circuit, shown here, the current is observed to lead the applied voltage. An additional capacitor C', when joined with the capacitor C present in the circuit, makes the power factor of the circuit unity. The capacitor C', must have been connected in parallel with C and has a magnitued
The potential differences of the resistance, the capacitor and the inductor are $$80 V, 40 V$$ and $$100 V$$ respectively in an $$L.C.R$$ circuit. The power factor of the circuit is
The power factor is an L-C-R circuit at resonance is
If the power factor in a circuit is unity, then the impedance of the circuit is
In L-C circuit power factor at resonance is:
In an L.C.R series resonant circuit, the power factor is __________.
A coil has a resistance of $$ 10\Omega $$ and an inductance of $$0.4$$ henry. It is connected to an AC source of $$6.5V,\dfrac{30}{\pi }$$Hz. Find the average power consumed in the circuit.
The power in A.C. circuit is given by $$P=E_{rms}i_{rms}\cos\phi$$. The value of power factor $$\cos\phi$$ in series LCR circuit at resonance is?
In an electrical circuit R, L, C and an a.c.voltage source are all connected in series.When L is removed from the circuit, the phase difference between the voltage and the currentin the circuit is $$\pi /3$$. If instead, C is removed from the circuit the phase difference is again $$\pi /3$$. The power factor of the circuit is
A resistor of $$500 \Omega$$, an inductance of $$0.5 H$$ are in series with an a.c. which is given by $$V = 100\sqrt{2} \sin{\left(1000 t\right)}$$. The power factor of the combination is