Homemade Electric Motor

NECESSARY TO MAKE THIS EXPERIMENT: 2 circles of plexiglass diameter 100 mm. x 4 mm. with a central hole of 10 mm. 16 small nails of 15 mm. x 1.5 mm. to be included within the circle of plexiglass with holes of 1.5 mm. 1 wooden bar 200 mm. x 10 mm. The maximum distance between the two circles of plexiglass in the wooden bar must be 120 mm. 8 plates of copper or brass 15-20 mm. x 0.4 mm. bent in a semicircle with the same diameter of the wooden bar. The plates of copper are to be glued over the wooden bar wit