Question

At resonance frequency the impedance in series LCR circuit is

• A. Maximum
• B. Minimum
• C. Zero
• D. Infinity

Answer 1

Answer: (B)

Minimum

Answer 2

: At resonance frequency, the inductive capacitive reactance are equal.

i.e., , $X_{L} = X_{C}$

$\therefore$Impedance,

$Z = \sqrt{R^{2} + (X_{L} - X_{C})^{2}} = \sqrt{R^{2} + 0^{2}} = R$