Which of the following conditions occur at resonance in a series RLC circuit? i. Impedance equal resistance ii. Current is maximum iii. Reactance are maximu...

Answer Details

At resonance in a series RLC circuit, the reactance of the inductor and capacitor cancel each other out, leaving only the resistance. This means the impedance of the circuit is equal to the resistance (i.e., i). At the same time, the current in the circuit is at its maximum (i.e., ii). Since the reactance of the inductor and capacitor cancel each other out, there is no phase difference between the current and voltage (i.e., iv is not true), so iii is not applicable. Therefore, the correct answer is (a) i and ii only.