The steering of a truck is bigger than that of a car, why?

Large trucks generally have a larger wheel to provide a greater mechanical advantage for turning the steering wheels.. Trucks are heavier than cars, and it takes more torque to turn the front wheels. The larger steering wheel gives the driver more leverage to operate the steering.

probably not the "magnets"in the magnet, so to speak, are thought to be electrons orbiting in shells. vurrent loops two sides to the loop