Contents
- 1 Why current is minimum at resonance in parallel resonance circuit?
- 2 Why parallel circuit is known as current magnification?
- 3 What is a parallel resonant circuit?
- 4 What are the applications of resonance?
- 5 When does parallel resonance occur in a resistive circuit?
- 6 How are resistors in parallel circuits related to each other?
- 7 How is the admittance of a Circuit determined at resonance?
Why current is minimum at resonance in parallel resonance circuit?
As the total susceptance is zero at the resonant frequency, the admittance is at its minimum and is equal to the conductance, G. Therefore at resonance the current flowing through the circuit must also be at its minimum as the inductive and capacitive branch currents are equal ( IL = IC ) and are 180o out of phase.
Why parallel circuit is known as current magnification?
By means of the parallel resonant circuit, the current taken from the supply can be magnified. This type of resonance is called current resonance. Quality factor of R-L-C parallel circuit is the current magnification in the circuit at resonance.
Which values decreases in parallel resonance?
As a result, there is a decrease in the magnitude of current I2 and this I2 current lags behind the voltage V. On the other hand, the value of capacitive reactance decreases and consequently the value of IC increases. At some frequency, fr called resonance frequency.
What is a parallel resonant circuit?
A parallel circuit consisting of inductor and capacitor in which the inductive reactance and the capacitive reactance are equal and obtain maximum impedance at the frequency at which the circuit is resonant.
What are the applications of resonance?
One use for resonance is to establish a condition of stable frequency in circuits designed to produce AC signals. Usually, a parallel (tank) circuit is used for this purpose, with the capacitor and inductor directly connected together, exchanging energy between each other.
What is meant by series resonance?
Series resonance is a resonance condition that usually occurs in series circuits, where the current becomes a maximum for a particular voltage. In series resonance, the current is maximum at resonant frequency. The series resonance current curve increases to a maximum at resonance then decreases as resonance is passed.
When does parallel resonance occur in a resistive circuit?
Parallel Resonance Circuit Parallel resonance occurs when the supply frequency creates zero phase difference between the supply voltage and current producing a resistive circuit In many ways a parallel resonance circuit is exactly the same as the series resonance circuit we looked at in the previous tutorial.
Hence in case of parallel resistive circuits, the current is not same in all the resistors. If I1 is the current flowing through the resistor R1, I2 is the current flowing through the resistor R2 and I3 is the current flowing through the resistor R3 then the currents I, I1, I2 and I3 can be related with the help of Kirchhoff’s Current Law.
How is a parallel tank circuit different from a parallel resonance circuit?
The difference this time however, is that a parallel resonance circuit is influenced by the currents flowing through each parallel branch within the parallel LC tank circuit. A tank circuit is a parallel combination of L and C that is used in filter networks to either select or reject AC frequencies.
How is the admittance of a Circuit determined at resonance?
At resonance the admittance of the circuit is at its minimum and is equal to the conductance of the circuit. Also at resonance the current drawn from the supply is also at its minimum and is determined by the value of the parallel resistance.