LittleBill wrote:
resistive loads work different, if the voltage drops, so does the load
Most loads work that way; exceptions under some circumstances are actively regulated supplies (where the regulator adjusts for the voltage) and some electric motors in some applications. As the batteries in a flashlight wear down (the voltage drops), the light gets dimmer, not brighter. At low voltages, motors run more slowly, not more quickly. At lower voltages, microwaves take longer to cook, not less time.
Heaters and other resistive loads are especially easy to analyze because the relationship between the voltage applied to them and the current they consume is linear, as defined in Ohm's law.
