English

Choose the Correct Answer from Given Options the Phase Difference Between the Current and the Voltage in Series Lcr Circuit at Resonance is

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

MCQ
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.

shaalaa.com
  Is there an error in this question or solution?
2019-2020 (March) Delhi Set 2

RELATED QUESTIONS

The figure shows a series LCR circuit with L = 10.0 H, C = 40 μF, R = 60 Ω connected to a variable frequency 240 V source, calculate

(i) the angular frequency of the source which drives the circuit at resonance,

(ii) the current at the resonating frequency,

(iii) the rms potential drop across the inductor at resonance.


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.


A solenoid having inductance 4.0 H and resistance 10 Ω is connected to a 4.0 V battery at t = 0. Find (a) the time constant, (b) the time elapsed before the current reaches 0.63 of its steady-state value, (c) the power delivered by the battery at this instant and (d) the power dissipated in Joule heating at this instant.


(i) An a.c. source of emf ε = 200 sin omegat is connected to a resistor of 50 Ω . calculate : 

(1) Average current (`"I"_("avg")`)

(2) Root mean square (rms) value of emf 

(ii) State any two characteristics of resonance in an LCR series circuit. 


The selectivity of a series LCR a.c. circuit is large, when ______.


A coil of 0.01 henry inductance and 1 ohm resistance is connected to 200 volt, 50 Hz ac supply. Find the impedance of the circuit and time lag between max. alternating voltage and current.


A series LCR circuit containing a resistance of 120 Ω has angular resonance frequency 4 × 105 rad s-1. At resonance the voltage across resistance and inductance are 60 V and 40 V respectively. At what frequency the current in the circuit lags the voltage by 45°. Give answer in ______ × 105 rad s-1.


Draw the phasor diagram for a series LRC circuit connected to an AC source.


Which of the following combinations should be selected for better tuning of an L-C-R circuit used for communication?


Out of the following which one is NOT the characteristic of LCR series resonant circuit?


Share
Notifications

Englishहिंदीमराठी


      Forgot password?
Use app×