Advertisements
Advertisements
Question
Choose the correct answer from given options
The phase difference between the current and the voltage in series LCR circuit at resonance is
Options
π
π/2
π/3
zero
Advertisements
Solution
At resonance the circuit is purely resistive and there is no phase difference between current and voltage.
Hence, the correct answer is option zero.
APPEARS IN
RELATED QUESTIONS
Why does current in a steady state not flow in a capacitor connected across a battery? However momentary current does flow during charging or discharging of the capacitor. Explain.
Find the value of t/τ for which the current in an LR circuit builds up to (a) 90%, (b) 99% and (c) 99.9% of the steady-state value.
An inductor-coil of inductance 17 mH is constructed from a copper wire of length 100 m and cross-sectional area 1 mm2. Calculate the time constant of the circuit if this inductor is joined across an ideal battery. The resistivity of copper = 1.7 × 10−8 Ω-m.
Consider the circuit shown in figure. (a) Find the current through the battery a long time after the switch S is closed. (b) Suppose the switch is again opened at t = 0. What is the time constant of the discharging circuit? (c) Find the current through the inductor after one time constant.
Figure shows a series LCR circuit connected to a variable frequency 230 V source. L = 5.0 H, C = 80 µF, R = 40 Ω.
- Determine the source frequency which drives the circuit in resonance.
- Obtain the impedance of the circuit and the amplitude of current at the resonating frequency.
- Determine the rms potential drops across the three elements of the circuit. Show that the potential drop across the LC combination is zero at the resonating frequency.
In series LCR AC-circuit, the phase angle between current and voltage is
Which of the following combinations should be selected for better tuning of an LCR circuit used for communication?
The net impedance of circuit (as shown in figure) will be ______.
Out of the following which one is NOT the characteristic of LCR series resonant circuit?
