An alternating voltage of frequency `f` is applied across a series `LCR` circuit.Le `f_(r)` be the resonance frequency for the circuit.Will the current in the circuit lag, lead or remain in phase with the applied voltage when (i)`f gt f_(r)`,(ii)`f lt f_(r)` ? Explain your answer in each case.

Explanation

(i) Current will lag because.
`V_(L) lt V_( C)` Hence `V_(L) - V_(C) gt O`
(ii) Current will lead, because.
`V_(L) lt V_( C)` Hence `V_(L) - V_( C) lt O`
(iii) In phase