1. How hair dryers work

2. Howhairdryerwork
When you put the plug of the hair dryer in the
plug-socket, the electric current will flow
trough the hair dryer. The wrapped filaments
of the heating element will be
provided with that current, so that the heating
element will warm up.
The current will also drive the motor, which
will next drive the fan.

3. Howhairdryerswork
The fan sucks air into the hairdryer. The air
pass the filaments of the
heating-element, so that it takes up the
warmth.
Finally, the heated air leaves the hair dryer
and dry the hair because it
accelerate the evaporation of the water on
the hair. The heat air raises as it were the
temperature of the air around the hair.