For the same RLC series circuit having a 40.0 Ω resistor, a 3.00 mH inductor, and a 5.00 μF capacitor: (a) Find the resonant frequency. (b) Calculate Irms at resonance if Vrms is 120 V.
Strategy
The resonant frequency is found by using the expression in f0=2πLC1. The current at that frequency is the same as if the resistor alone were in the circuit.