circuit AC 1) Circuit 4 is sometimes called an \"anti-resonant\" circuit. Why mi
ID: 1401315 • Letter: C
Question
circuit AC1) Circuit 4 is sometimes called an "anti-resonant" circuit. Why might this be the case?
2) For the RLC cuircut, what effect does changing the resistance have on the circuit? circuit AC
1) Circuit 4 is sometimes called an "anti-resonant" circuit. Why might this be the case?
2) For the RLC cuircut, what effect does changing the resistance have on the circuit? circuit AC
1) Circuit 4 is sometimes called an "anti-resonant" circuit. Why might this be the case?
2) For the RLC cuircut, what effect does changing the resistance have on the circuit?
Explanation / Answer
In a parallel circuit containing equal XL and XC, the external circuit current is equal to that flowing through the parallel resistance. If the circuit contains no parallel resistance, the external current is zero. However, within a theoretical circuit consisting only of L and C and XL = XC, a large current called the "circulating current" flows, using no current from the power line. This occurs because the corresponding instantaneous values of the currents IL and IC always flow in opposite directions and, if these values are equal, no external circuit current will flow. This is called a "parallel resonant" circuit.
Because no external current flows in a resonant parallel circuit consisting only of L and C, the impedance at resonance is infinite, IL equals IC, and the total circuit current IT is zero. Since these effects are exactly opposite those of series resonance, parallel resonance is sometimes called "anti-resonance." Ohm's law for AC when applied to a parallel resonant circuit can be used to determine the value of the internal circulating current.
2)
the frequency of the circuit will be not affected by the changing of the resistance in the circuit
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