Question

At resonance frequency the impedance in series LCR circuit is
(a) maximum
(b) minimum
(c) zero
(d) infinity

Answer 1

Answer:

b

Explanation:

Impedance magnitude=

$\sqrt{({ r}^{2} + (xl - xc) ^{2} }$

At resonance condition,

xl=xc

so impedance is resistance(r);which is minimum impedance for series rlc circuit