Alternating CurrentHard

Question

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 current in the circuit is π/3. If instead, C is removed from the circuit, the phase difference is again π/3. The power factor of thecircuit is

Options

A.
B.
C.
D.1

Solution

Circuit is at resonance
xL = xC
⇒ cos φ = 1

Create a free account to view solution

View Solution Free
Topic: Alternating Current·Practice all Alternating Current questions

More Alternating Current Questions

In an LCR series a.c. circuit, the voltage across each of the components, L, C and R is 50 V. The voltage across the LC ...A capacitor is connected to an A.C. generator. The ratio of reactance and impedance of capacitor is:...The inductance of a choke coil is 0.2 henry and its resistance is 0.50 ohm. If a current of 2.0 amp (rms value) and freq...Two different A.C. circuits have same current. One is containing only inductance while the other contains only capacitan...The r.m.s value of potential difference V shown in the figure is...