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is using steel rebar for an electromagnet a good idea?
I am building an electromagnet using a foot-long piece of rebar. In the final stage I want to run it off of DC current using an AC to DC converter, I want the polarities to be constant.
BUT as for now, the magnet seem VERY weak, I thought I had the insulated wire ran enough time around it. I have tried it using a 1.5 amp DV converter from Radio Shack, and a regular full charged car battery, I have even plugged it straight into the wall. In ALL cases I am using a household lamp (with a 200 watt bulb) to diffuse the power so I dont blow a fuse breaker in the house.
None the less, the magnet is all cases seems to be weak? Am I using the wrong kind of core? or do I need to wrap the wire around it more?
Eventually I want to try using an RV power converter - that will supply me with 12 volts and 40 amps of DC current, but as of now - I want to make sure I am covering all my bases.
this is all for a science project that i am working on. any help would be great.
Having a steel core is a bad idea as steel takes a much longer time to induse magnetism, unlike iron which has instantaneous effect.
In addition, should wrap the wire around in alot more.
Lastly, the bar is just just too long. If I were u, i would try and reduce the length of the bar and then see its effect. I am pretty sure that it will become stronger as less magnetic field lines will be lost.
Hope it helps,
BART
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