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
(i) Find the value of the phase difference between the current and the voltage in the series LCR circuit shown below. Which one leads in phase : current or voltage ?
(ii) Without making any other change, find the value of the additional capacitor C1, to be connected in parallel with the capacitor C, in order to make the power factor of the circuit unity.

The time constant of an LR circuit is 40 ms. The circuit is connected at t = 0 and the steady-state current is found to be 2.0 A. Find the current at (a) t = 10 ms (b) t = 20 ms, (c) t = 100 ms and (d) t = 1 s.
An L-R circuit has L = 1.0 H and R = 20 Ω. It is connected across an emf of 2.0 V at t = 0. Find di/dt at (a) t = 100 ms, (b) t = 200 ms and (c) t = 1.0 s.
In a series, LCR circuit, obtain an expression for the resonant frequency.
For a series LCR-circuit, the power loss at resonance is ______.
To reduce the resonant frequency in an LCR series circuit with a generator ______.
Which of the following combinations should be selected for better tuning of an LCR circuit used for communication?
An alternating voltage of 220 V is applied across a device X. A current of 0.22 A flows in the circuit and it lags behind the applied voltage in phase by π/2 radian. When the same voltage is applied across another device Y, the current in the circuit remains the same and it is in phase with the applied voltage.
- Name the devices X and Y and,
- Calculate the current flowing in the circuit when the same voltage is applied across the series combination of X and Y.
Select the most appropriate option with regard to resonance in a series LCR circuit.
When a capacitor is connected in series LR circuit, the alternating current flowing in the circuit ______
