This generator model is used to indicate changes in mechanical energy into electrical energy or vice versa. The apparatus mounted on a wooden base 25 x 25 cm. Operated by rotating the crank by hand. Equipped with split ring commutator for DC voltage output and fixed commutator rings to the output AC voltage. Magnetic field comes from a removable magnetic U. The model is exposed so that how it works is easily observed. Completed with 4 mm screrwed terminals.