If you really think about it, starting our cars as easily as we do every day is something of a modern miracle. We jump into our vehicles, turn a key (or even just push a button on many occasions), and ...

Solenoids at turn-on draw currentthat is much higher than the currentneeded to keep the armature pulledin. Further, because of the power dissipatedin the coil, the solenoid’s temperaturewill rise, and ...