Question

What do you mean by resonant frequency?

Answer 1

When the frequency of the applied alternating source (ω_r) is equal to the natural frequency `[1/sqrt"LC"]` of the RLC circuit, the current in the circuit reaches its maximum value. Then the circuit is said to be in electrical resonance. The frequency at which resonance takes place is called resonant frequency. Resonant angular frequency, ω_r = `1/sqrt"LC"`.