A current carrying coil in a magnetic field will rotate. This is because the current going up on side of the coil is in the opposite direction to the current going down the other side.
How does this electric motor work?
The current going up one side of the coil is in the opposite direction to the current going down the other side of the coil, making the motor rotate. 2. The brush contacts the commutator to make sure the coils current direction is the same and that the motor continues rotating
How can you make an electric motor faster?
Increase the current
How can you an electric current rotate in the other direction?