I could also investigate the material of the coil, which is another factor affecting the strength of an electromagnet. I could investigate this, by placing different materials, like iron, copper, and steel inside the core of the electromagnet, I would keep current and the number of turns constant.
For other video games with this title, see E.T. the Extra-Terrestrial in video games. E.T. the Extra-Terrestrial (also referred to simply as E.T.) is a 1982 adventure video game developed and published by Atari, Inc. for the Atari 2600 video game console. It is based on the film of the same name, and was designed by Howard Scott Warshaw.
John Deere Tractor History Deere & Company was founded in 1868 by blacksmith John Deere. Deere had achieved great success in 1837 when he built a plow from highly polished steel. Deere entered the tractor manufacturing business in 1918. Deere sold a small number of tractors designed by Joseph Dain, with limited success. That same year, Deere purchased the Waterloo Gasoline Traction Engine Company, that built the Waterloo Boy tractor.