Question

In what ways can a motor be made more powerful

Answer 1

make electric motor more powerful by:
1) Increasing the number of turns of the rotating coil.
2) using stronger magnet.
3) multiplying the number of coils and commutator segments.
4) winding the coil on a soft iron core;
the soft iron core becomes magnetised and concentrates its magnetic field in the coil, this increases the forces on the coil.
5) Attach a gearbox as this will greatly increase the amount of power a motor will output. This may take some calculation for the desired output torque you are wanting to achieve