hola
if an inductor has inductance L then the voltage V across it and the current I through it satisfy
V = (-1) * L * dI/dt
and yet its impedance to a sinusoidal voltage with angular frequency w is NOT the expected
(-1) * L * j * w
but rather
(+1) * L * j * w
how come? or rather: what am i missing THIS time?
peace stm