How to build a motor<br>Wind wire around a cylindrical object like a pen or pencil cell. This coil of wire will be the moving motor armature. If the wire is thick then the diameter of the coil should be larger.
there is a trick is the wire is thick that you can use. 
according to the text, If the wire is thick then the diameter of the coil should be larger, so it could be considered as a trick. 
( z1 thick :ARG1 ( z2 wire ) :ARG0-of ( z3 cause :ARG1 ( z4 possible :ARG1 ( z5 use :ARG0 ( z6 you ) ) ) ) )