The series RL circuit: i(t)=loe At zero time. the current is the o And as time increases. the current decreases and approaches zero The initial rate of decay is found by evaluating the derivative at zero time i/I R dt t RLThe series RL circuit: t L R i t I e − = 0 ( ) At zero time, the current is the I0 . And as time increases, the current decreases and approaches zero. i t 0 0 I The initial rate of decay is found by evaluating the derivative at zero time. L R t e L R dt t I i d t L R = − = = − = − 0 0 ( ) 0 1 t 0 0 i / I 