Electric Motor Demonstration with 2, 3, and 4 Pole Armatures Geology demonstrating mechanical-to-electrical energy conversion as

demonstrating mechanical-to-electrical energy conversion as the crank lights the bulb

the unit also runs as a motor on 6-8V DC for energy conversion demos

Square-section aluminum tube 1 meter long with side graduations and four sliding riders

Beech wood test tube rack holds 12 tubes up to 20mm diameter in a 9-inch frame for organized storage during chemistry and biology experiments

Electric Motor Demonstration with 2, 3, and 4 Pole Armatures Geology demonstrating mechanical-to-electrical energy conversion asCompares 2 , 3 , and 4 pole armature configurations on the same motor frame by swapping interchangeable enameled copper armatures past a permanent bar magnet on a disc commutator.