Need help with iron solenoid/core for an electromagnet?

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SUMMARY

The discussion focuses on constructing an electromagnet using a battery, copper wire, and an iron core, specifically a magnetic spoon or a magnetic nail. It confirms that the setup will function as an electromagnet once current flows, emphasizing the importance of checking resistance to gauge expected current and magnetic field strength. The conversation highlights that tightly winding the wire increases magnetic strength and suggests using soft iron from old transformers for optimal performance, as opposed to common steel, which retains magnetism after current cessation.

PREREQUISITES
  • Understanding of electromagnetism principles
  • Basic knowledge of electrical resistance and current
  • Familiarity with wire winding techniques
  • Experience with materials like soft iron and steel
NEXT STEPS
  • Research how to measure electrical resistance using a multimeter
  • Learn about the properties of soft iron versus steel in electromagnet applications
  • Explore techniques for winding wire to maximize magnetic field strength
  • Investigate the process of dismantling old transformers for soft iron cores
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This discussion is beneficial for hobbyists, electrical engineers, and anyone interested in building electromagnets or enhancing their understanding of magnetic fields and materials.

mrphaam
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i'm making an electromagnet with a battery, some copper wire, and a iron solenoid/core. For the core I'm using is a magnetic spoon, i was just wondering, will it work?

here's a picture, http://img706.imageshack.us/img706/9348/spoont.jpg , I'm not done wrapping the wire

basically it's either the spoon, or a magnetic nail the size of my finger
 
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Welcome to PF;
You will certainly have an electromagnet once the current is going - you may want to check the resistance to see what sort of current to expect. That will give you an idea of the likely magnetic field.

Apart from that, it depends on what you mean by "work": what do you hope it will do?
 
A quick hint: the more you wind it, and the tighter you wind it, the stronger the magnetic field will be.
 
If you want to make a good electromagnet, you can't beat the iron fomer you can get out of an old chuckout transformer. A bit of a struggle to strip it apart but it could be well worth the effort.
Most of the 'iron' you find around the place is, in fact, steel, which tends to stay magnetised once you turn off the current and you may not want that. Transformers have 'soft iron' which is just what you want.
 

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