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RLC Circuits and Resonance

Q1:

A 24  resistor, an inductor with a reactance of 120 , and a capacitor with a reactance of 120  are in series across a 60 V source. The circuit is at resonance. The voltage across the inductor is

A 60 V

B 660 V

C 30 V

D 300 V

ANS:D - 300 V

Series resonance circuit as VL = -VC the resulting reactive voltages are zero and all the supply voltage is dropped across the resistor. Therefore, VR = V supply and it is for this reason that series resonance circuits are known as voltage resonance circuits. So option A that is 60 v.



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