This is something that has stumped me for a long time. Say I am designing a seat heater for my car. I obviously have a voltage of 12 volts. That cannot change. Then I have a heating coil which has a 12-ohm resistance. Using ohms law, this will draw 1 amp.
Now say I switch the coil with a 24-ohm coil. According to Ohm's Law, it will now draw 0.5 amps.
It seems to me that this doesn't make sense. Wouldn't a higher load draw a higher current? Otherwise, how do variable temperature seat heaters work? Do they lower the resistance to increase the temperature?
I'm just having a hard time wrapping my brain around this so any help would be greatly appreciated. Thanks!
Now say I switch the coil with a 24-ohm coil. According to Ohm's Law, it will now draw 0.5 amps.
It seems to me that this doesn't make sense. Wouldn't a higher load draw a higher current? Otherwise, how do variable temperature seat heaters work? Do they lower the resistance to increase the temperature?
I'm just having a hard time wrapping my brain around this so any help would be greatly appreciated. Thanks!