|MadSci Network: Engineering|
Years ago I worked on a device that used an electromagnet with an unusual core material. When energized, the EM produced quite a powerful field. But when the current stopped flowing, the core had NO residual magnetic effect. I'm now trying to show this to a bunch of 6th graders but the only material I've found even similar is brass bolts. We are trying to make a EM that has a powerful field when energized but nothing when power is removed. Help!
Re: What core material for an electromagnet would not have a residual effect?
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