||You will be familiar with the model motor on page 10. A simple d.c. motor works on the same principals except that it has more coils. This makes it more efficient.
However, it is still very wasteful because of:
Also, if the motor gets stuck (possibly through trying to lift too big a load), the rotor coils can overheat and melt.
Therefore, most industrial and heavy home appliances use an induction motor (below). They are used in washing machines, fridges, central heating pumps etc.