Advertisements
Advertisements
प्रश्न
State any two characteristics of a series LCR AC resonance circuit.
Advertisements
उत्तर
- Resonance occurs when XL = XC.
- Resonant frequency fr = `1/(2pisqrt"LC")`
- Impedance is minimum and the circuit is purely resistive.
- Current has a maximum value.
- When a number of frequencies are fed to it, it accepts only one frequency (fr) and rejects the other frequencies. The current is maximum for this frequency. Hence it is called the acceptor circuit.
APPEARS IN
संबंधित प्रश्न
In a series LCR circuit at resonance, the applied emf and current are - ______
A series LCR resonant circuit is used as ______
In the LCR series circuit, what is the condition for current resonance?
State any one characteristic of a parallel LC AC resonance circuit.
In the LCR series circuit, what are the (a) impedance and (b) reactance at current resonance?
A coil of resistance 10 Ω and inductance 100mH and a capacitor of variable capacitance are connected across a 20V, 50Hz A.C. supply. At what capacitance will resonance occur?
In an LCR circuit, at resonance ______
Out of the following graphs, which graph shows the correct relation (graphical representation) for LC parallel resonant circuit?
In the given electrical circuit, which one of the following equations is a correct equation?
At what frequency (approximate) will the inductive reactance of 4 H inductance be equal to the capacitive reactance of 4 µF capacitance?
Out of the following graphs which graph shows the correct relation for LC parallel resonant circuit?
In rejector circuit, above resonant frequency the circuit is ____________.
The resonant frequency of a series LCR circuit is 'f'. The circuit is now connected to the sinusoidally alternating e.m.f of frequency '2f'. The new reactance X'L and X'C are related as ____________.
An a.c. source of variable frequency 'f' is connected to an LCR series circuit. Which one of the graphs represent the variation of current 'I' in the circuit with frequency 'f'?
An electric lamp connected in series with a capacitor and an AC source glows with a certain brightness. (a) How does the average power change on increasing the capacitance? (b) How does the brightness of the lamp change on increasing the capacitance?
State the use of the acceptor circuit.
A coil of resistance 5 Ω and self inductance 0.2 H is connected in series with variable capacitor across a 30 V(rms), 50 Hz supply. (i) At what capacitance resonance occur? (ii) Find the corresponding current.
Find the reactance of a coil of inductance 100 mH at a frequency of 50 Hz.
In LCR series circuit, the condition for current resonance is ______.
What is a rejector circuit?
What are the Uses of rejector circuit?
A particle starting from extreme position performs S.H.M. The phase difference of the particle between any two successive mean positions is ______.
In an L-C-R series resonant circuit, the angular frequency at resonance is ‘ω’. When the inductance of inductance is made twice and capacitance of the capacitor is made four times, the angular frequency at resonance is ‘ω₁’. The ratio of ω: ω₁ is
