An L . C . R . circuit contains resistance of 110 Ω and a supply of 220 V at 300 rad s - 1 angular frequency. If only capacitance is removed from the circuit, current lags behind the voltage by 45 ° .

Question

An L . C . R . circuit contains resistance of 110 Ω and a supply of 220 V at 300 rad s - 1 angular frequency. If only capacitance is removed from the circuit, current lags behind the voltage by 45 ° . If on the other hand, the only the inductor is removed the current leads by 45 ° with the applied voltage. The R . M . S . current flowing in the circuit will be:

TestHub · Accepted Answer

tan 45 ° = 1 ω C R = ω L R ⇒ X L = X C ⇒ resonance i = V R = 220 110 = 2 A

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