The issue focused on how long it takes for electronic devices to shut down after being powered down. Most electric devices turn off after about ten minutes, but some require about 20 minutes. Even before they shut down, they often continue to generate heat for some time. Most electric devices do not shut down completely even after they have been powered down. 
 
 These devices work by heating up a liquid solution. If you hold a strip of metal between two wires for a few seconds, you can create a magnetic field. If you move the strip away from the wire, it