i'm having trouble making sense of impedance. bear with me a second: i'm going to start slow because i want to be sure of asking this question properly.

let's say an ideal inductor, with inductance L, has leads A and B, and that B is grounded, so that B's voltage level by definition is always zero. let V(t) be the voltage level of A at time t, and let I(t) be the current going through the inductor at time t, measured in such a way that a current entering through A and exiting through B is taken as positive.

in this situation is it not the case that

V(t) = (-1) * L * I'(t)

where I' is the derivative of I ...? if i'm already mistaken about this part there's no point asking the rest of my question, so i'll leave it there for now and hopefully someone can offer some enlightenment.

peace

stm