Electrical Engineering - RC Circuits - Discussion

Discussion :: RC Circuits - General Questions (Q.No.27)


When the frequency of the voltage applied to a series RC circuit is decreased, the impedance

[A]. increases
[B]. decreases
[C]. remains the same
[D]. doubles

Answer: Option A


No answer description available for this question.

Naresh Goud said: (Nov 16, 2013)  
Impedance(z) = R-jXc.

Xc = 1/2pifc now as frequency increases capacitive reactance(Xc) will decreases so total impedance will rise.

Manikonda Malakondaiah said: (Jul 3, 2014)  
Z=R-(j/fc), as f decreases, 1/fc factor increases so Z will be decreased. Correct answer is option B. Please change the option as early as possible.

Roopesh D M said: (Jun 18, 2015)  


So if F decreases Xc increases. So Z=SQRT (R^2+ Xc^2) increases.

Rounak said: (Feb 13, 2020)  
Yes, the impedance would fall.

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