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
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?
Obtain the expression for the resonant frequency of the LCR series circuit and explain electrical resonance in an LCR series circuit.
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 series resonance, LCR circuit, below the resonant frequency, the circuit is ____________.
An A.C. voltage of r.m.s. value 0.1 V is applied to an LCR series circuit in which L = 100 µH and C = 9 x 10-8 F and R = 2 `Omega`. The resonant frequency will be ____________.
If the potential difference across the inductor (9 mH) is same as that across the condenser (10 µF) in a series R-L-C circuit, then the frequency of the applied e.m.f. is nearly ____________.
In the given electrical circuit, which one of the following equations is a correct equation?
A transistor-oscillator using a resonant circuit with an inductor L (of negligible resistance) and a capacitor C in series produce oscillation of frequency f. If L is doubled and C is changed to 4C, the frequency will be ____________.
In parallel resonance, the current will be minimum, when ____________.
Out of the following graphs which graph shows the correct relation for LC parallel resonant circuit?
In a series resonant circuit, having L, C and R as its elements, the resonant current is i. The power dissipated in circuit at resonance is ______.
In LC parallel resonance circuit, choose the correct statement.
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?
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.
In LCR series circuit, the condition for current resonance is ______.
What are the Uses of rejector circuit?
