Image Credit

Description:

Electricity science project Figure 1.The panel on the left shows the motor and the laser tachometer. The motor consists of a small screwdriver, a length of copper wire, a C battery, a piece of reflective tape (for the laser tachometer reading), and neodymium batteries. The panel on the right focuses on the axis through the magnets.

Source:

David Whyte, Science Buddies

License:

Science Buddies