In the first example of how students designed a DC motor, a wire with greater
diameter was used to generate greater speed based on smaller resistance and higher
electrical current flow in the wire. Then students compared with the original coil (assembled
by Tamiya). The motor rotated more rapidly, but it moved more slowly on the circuit (no
power), while the original coil moved faster on circuit. As a result, students got the idea to
design the coil using a thin wire in order to wind it more compared with a thick wire and
fewer windings. Finally, they found evidence that the two kinds of winding (of the coil) were
no different in terms of performance. As a result, they concluded that low resistance would
generate low power. This conclusion differed from those of other groups that stated that a
thick wire had low resistance and would generate greater power and speed. Finally, they
checked several articles related to the design of a DC motor and concluded that according to
electromagnetic principles (application of scientific concepts), a thick wire, an increased
number of windings, and a strong magnet were needed to design a high-performance
motor. However, they did not think about the heat (engineering).