Can an electric coil used instead of a permanent magnet?
The direction of rotation is independent of the polarity of the power supply!
This is due to the fact that both the direction of the current from the axle to the inner contact of the coil and the direction of the current in the coil are reversed.
This also proves that it is the same effect as with the permanent magnet.
Construction
One electrical connection of the coil (enameled copper wire 1 mm in diameter) is made from the inside via the axle with the aid of a small brass disc, the other on the outside via a brass band that surrounds the coil. There is a thin iron tube inside the coil to increase the effect, but 8V / 40A are still required to demonstrate a rotary movement.
Conclusion
There is no different using an electric coil or a permanent magnet.