Question

At resonance frequency the impedance in series LCR circuit is
A. maximum
B. minimum
C. zero
D. infinity

Answer 1

Correct Answer - B
At resonance frequency, the inductive and capacitive reactance are equal.
i.e., `X_(L)=X_(C )`
`therefore` Impedance, `Z=sqrt(R^(2)+(X_(L)-X_(C ))^(2)) = sqrt(R^(2)+0^(2))=R`