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.
Sree said:
1 decade ago
What is meant by nonideal circuit?
Aalya said:
1 decade ago
f=1/2*3.14*sqrt(75*10^-3*0.033*10^-6) = 3.257
Xl = 2*3.14*3.257*75*10^-3 = 1.534
Q = 1.534 / 130 = 0.011
z= 130*(0.011^2 +1) =130.01
i = 5/130.01 = 38.5 mA
Xl = 2*3.14*3.257*75*10^-3 = 1.534
Q = 1.534 / 130 = 0.011
z= 130*(0.011^2 +1) =130.01
i = 5/130.01 = 38.5 mA
Aalya said:
1 decade ago
Q=1/r*sqrtl/c =11.59
z =130(11.59^2+1) =17592.6
I=5/17592.6 = 284.2uA
z =130(11.59^2+1) =17592.6
I=5/17592.6 = 284.2uA
A BramhaKumar said:
1 decade ago
Whats the basic formula used?
Hoha said:
1 decade ago
At resonance XL - Xc = 0.
Z = sqrt(r2) = r.
I = v/z.
Z = sqrt(r2) = r.
I = 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.
Ritika said:
1 decade ago
The answer should be 38.5 m by using formula v/z.
Emil Lagman said:
1 decade ago
Z = (L/RC).
It = Vs/Z.
= 286 microAmp close enough.
It = Vs/Z.
= 286 microAmp close enough.
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.
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.
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