For a single resistor in a circuit all of the voltage is lost across that one resistor. But when there is more than one resistor in the circuit (in series or otherwise) the voltage is distributed according to the resistance of each resistor. Why is it that all of the voltage is not lost over the first resistor in this circumstance? How does it know not to lose all of its voltage across the first resistor and keep some for the other one? Thanks for any help.