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.
In July 1982, during the film's first theatrical run, Spielberg and Mathison wrote a treatment for a sequel to be titled E.T. II: Nocturnal Fears. It would have shown Elliott and his friends getting kidnapped by evil aliens and follow their attempts to contact E.T. for help.