At the same time, it shuts off the electricity. In some newer toasters, the thermocouple is replaced by a small timer.
In a hair dryer, a small fan is turned on at the same time the heater coils are turned on. The moving air is forced over the glowing wires, warming the air. The warm air blows out of the front of the hair dryer and causes the water in your hair to evaporate and dry.
…
