The fact is, they are not that practical by any means. Unfortunately, you will never generate enough power from the homopolar motor to power any domestic appliances but you are extreme fun to generate and really great for demonstrating the effects of electromagnetism and exactly how electric motors work. Because high currents flow through the wire battery ends rapidly. Also, the wire and battery might get scorching, if you're going to make one yourself, please handle with care. Fancy making one on your own? We still have several tips: 1) The wire could be bent to any shape but one end should be touching the positive terminal on the battery and also the other must N35 neodymium magnets be N38 neodymium magnets talking to the neodymium magnet. 2) The secret is to generate a shape with the wire allowing it to balance properly, if it is unbalanced it will soon fall off it because it begins to spin. 3) Please be careful if making your personal DIY homopolar motor because wire and battery may become incredibly hot. 4) Neodymium magnets would be the strongest on earth rest room you will often view a neodymium disc magnet utilized in this configuration. The stronger the magnet, the quicker the wire will spin. If employing an AA battery to generate a homopolar motar a great magnet to utilize is often a 12mm diameter x 6mm thick neodymium disc magnet.