Question

Sketch a graph showing the variation of impedance of LCR circuit the frequency of applied voltage.

Answer 1

The impedance of LCR circuit is
`Z = sqrt(R^(2) + (X_(L) - X_(C ))^(2))`
`sqrt(R^(2) + (2 pi v L - (1)/(2 pi v C))^(2)`
The variation or Z with iv is shown if Fig
At `v = v_(r) , X_(L) = X_(C ) , Z = R = ` minimum.