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 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?
A parallel plate air condenser of capacity 10 µF is charged to a potential of 1000 V. The energy of the condenser is ______
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 ____________.
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 ____________.
In a resonance tube, first and second resonance positions occur respectively at 28 cm and 88 cm. If the frequency of the fork is 300 Hz, then the speed of sound is ____________.
In LCR circuit, the capacitance is changed from C to 4C. For some resonant frequency, the inductance should be changed from L to ____________.
In rejector circuit, above resonant frequency the circuit is ____________.
In series resonant circuit, at resonance, ____________.
The LCR series and parallel resonant circuits are respectively called as ____________.
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.
In LCR series circuit, the condition for current resonance is ______.
What is a rejector circuit?
What are the Uses of rejector circuit?
