A Series RL Circuit Is Connected to an Emf Source $\omega$

Multiple Choice

A series RL circuit is connected to an emf source of angular frequency $\omega$ . The current:

A) leads the applied emf by tan^-1( $\omega$ L/R)
B) lags the applied emf by tan^-1( $\omega$ L/R)
C) lags the applied emf by tan^-1( $\omega$ R/L)
D) leads the applied emf by tan^-1( $\omega$ R/L)
E) is zero