Electrical Engineering - RLC Circuits and Resonance - Discussion
Discussion Forum : RLC Circuits and Resonance - General Questions (Q.No. 9)
9.
A 200 
resistor, a coil with 30 of reactance, and a capacitor of unknown reactance are in series across an ac source. The circuit is at resonance. Circuit impedance
resistor, a coil with 30 of reactance, and a capacitor of unknown reactance are in series across an ac source. The circuit is at resonance. Circuit impedanceis 230
is 170
is 200
cannot be determined
Discussion:
4 comments Page 1 of 1.
Sajawal said:
6 years ago
At resonance R = Z simple.
(1)
Fidel said:
7 years ago
At resonance, XL = XC.
So, since XL is given to be 30ohs, XC should be 30ohms as well. This is what I think and I see something different can anyone clarify me, please.
So, since XL is given to be 30ohs, XC should be 30ohms as well. This is what I think and I see something different can anyone clarify me, please.
Aman Joshi said:
1 decade ago
At resonant,
Inductive Reactance (XL) = Capacative Reactance (Xc).
So, Impedance (Z) = Resistance (R) = 200 ohm.
Inductive Reactance (XL) = Capacative Reactance (Xc).
So, Impedance (Z) = Resistance (R) = 200 ohm.
Amrit kumar mohanta said:
1 decade ago
Z=SQRT(R^2+(XL-XC)^2)
at resonance condition XL-XC=0
so Z=SQRT(R^2)
at resonance condition XL-XC=0
so Z=SQRT(R^2)
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