eli5: if input pins are in a high impedance state when no voltage is supplied, how is that equivalent to having a LARGE SERIES RESISTOR in front of the pin?

Question

Wouldn’t the hypothetical large series resistor make it harder for current to flow through? Or is it because the pins can still change states even with the very little hypothetical current they get? I don’t know my own confusion lol.

In: 1

Answer 1

In a DC circuit the impedance is the same as resistance as there is no reactance component to the vector. So in the DC circuit you can replace it with an equivalent resistor to simplify calculations.