A) the phase difference between current and voltage is\[{{90}^{o}}\]
B) the phase difference between current and voltage is\[{{45}^{o}}\]
C) its impedance is purely resistive
D) its impedance is zero
E) the current is minimum
Correct Answer: C
Solution :
An L-C-R series circuit is at resonance. Then its impedance\[znin=R\].
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