When does the impedance of a series L-C-R (AC) circuit become minimum ?

Options

A. when the resistance is equal to zero
B. when the impedance is equal to zero
C. when the electric current is equal to zero
D. When the imaginary part of the impedance is equal to zero.

Answer

D

Explanation

In `Z=R+j (omegaL-1/(omegaC))` when is equal to zero `omegaL-1/(omegaC)` become then Z=R which becomes minimum . Here `j(omegaL-1/(omegaC))` is imaginary part of impedance.