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The minimum value of the impedance in case of the series RLC network is ___________

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The minimum value of the impedance in case of the series RLC network is ___________

(a) R

(b) 0

(c) Xl

(d) Xc

I got this question during an internship interview.

I want to ask this question from Electric Motors topic in chapter Braking of Electric Motors of Electric Drives

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The correct choice is (a) R

To elaborate: The minimum value of the series impedance in case of the series RLC network is R. During resonance condition Xl=Xc so Z=(R^2+(Xl-XC)^2)^.5=R.

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