Electronics - RLC Circuits and Resonance - Discussion
Discussion Forum : RLC Circuits and Resonance - General Questions (Q.No. 32)
32.
What is the total current for the nonideal circuit in the given circuit. If it is at resonance?
0 A
284 
A
A3.3 mA
38.5 mA
Discussion:
13 comments Page 1 of 2.
Simpol said:
5 years ago
Leakage current in micro-ampere range.
Srideepz said:
5 years ago
Resultant current at resonance in parallel circuit I=V÷(L/CR) by sub all values we get I=286micro ampere.
Najnaj said:
7 years ago
Convert the circuit to the equivalent practical circuit.
fr = 1/2π*√(LC) = 3.2kHz.
Rpractical = ((Rs^2)+(Xl^2)) / Rs = 17612.51 ohms,
since Xl = Xc at resonance,
Z = Rpractical,
Therefore;
5/ Rpractical = 283.88 micro ampere.
fr = 1/2π*√(LC) = 3.2kHz.
Rpractical = ((Rs^2)+(Xl^2)) / Rs = 17612.51 ohms,
since Xl = Xc at resonance,
Z = Rpractical,
Therefore;
5/ Rpractical = 283.88 micro ampere.
Kate said:
8 years ago
Actually you solve this using Q of a practical circuit.
At resonance, Xl = Xc solving for fr,
fr = 1/2pi*sqrt(LC) = 3.2kHz.
Q = Xl/Rs = 2pi(3.2k)(75mH)/130 = 11.6.
Solving for impedance, Z:
Z = Q^2(Rs) = (11.6)^2(130) = 17491.98.
Solving for the total current, It:
It = V/Z = 5/17491.98 = 285.84 uA.
which is almost the same with 284 uA.
At resonance, Xl = Xc solving for fr,
fr = 1/2pi*sqrt(LC) = 3.2kHz.
Q = Xl/Rs = 2pi(3.2k)(75mH)/130 = 11.6.
Solving for impedance, Z:
Z = Q^2(Rs) = (11.6)^2(130) = 17491.98.
Solving for the total current, It:
It = V/Z = 5/17491.98 = 285.84 uA.
which is almost the same with 284 uA.
Hima said:
9 years ago
@Aalya.
Is z = R * (Q^2 + 1)? Please tell me, thanks in advance.
Is z = R * (Q^2 + 1)? Please tell me, thanks in advance.
Emil Lagman said:
1 decade ago
Z = (L/RC).
It = Vs/Z.
= 286 microAmp close enough.
It = Vs/Z.
= 286 microAmp close enough.
Ritika said:
1 decade ago
The answer should be 38.5 m by using formula v/z.
Rrgiri said:
1 decade ago
@Alya : Can't understand z = 130*(0.011^2 +1) = 130.01.
What is it's corresponding formula. Please reply, thanks in advance.
What is it's corresponding formula. Please reply, thanks in advance.
Hoha said:
1 decade ago
At resonance XL - Xc = 0.
Z = sqrt(r2) = r.
I = v/z.
Z = sqrt(r2) = r.
I = v/z.
A BramhaKumar said:
1 decade ago
Whats the basic formula used?
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