For an `LCR` circuit,

Options

A. `A` and `B` represent `R` and `Z` respectively
B. `A` and `B` represent `Z` and `R` respectively
C. `A, B, C, D` represent `Z, X_(L), R, X_(C )` respectively
D. for `omega = omega', the phase difference between current and voltage is zero

Answer

C, D

Explanation

As we know, `R` is independent of `omega, X_(L) prop oemga`,
`X_(C ) prop (1)/(omega)`
So `A, B, C, D` represent `Z, X_(L), R, X_(C )` repectively. Now `Z` is minimum when `omega = omega'`, for which current and voltage are in phase.