I'm doing a lecture on electricity for my class and one of the students at the beginning of the semester wanted to know how a curling iron works. So I've never ripped open a curling iron but I assume there's coils of wires within the little 'arm' parts that rely on ohmic heating. However, since I want to do a realistic example, I was wondering if anyone knows the voltage one might see across the heating element in a curling iron or even a hair dryer. The voltage at the wall is obviously 110-120V but I'm clueless as to whether or not anything is used in such an appliance to step up or down the voltage or even convert it to DC. I'm googling but anything with "curling iron" and "voltage" leads right to "european voltage converter for your bathroom accessories!" :(.