Which of the following conditions occur at resonance in a series RLC circuit? i. Impedance...

WAEC 2014

Which of the following conditions occur at resonance in a series RLC circuit? i. Impedance equals resistance ii. Current is maximum iii. Reactance is maximum iv. Current and voltage are 90° out of phase

A. i and ii only
B. i and iii only
C. i, ii and iii only
D. i, ii, iii and iv

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Correct Answer: Option A

Explanation

conditions for the occurrence of resonance in a series RLC circuit are i) impedance is at minimum ie when inductive and capacitive reactances are equal ii) when current is maximum

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