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Magnetic field generation

 
 
Reply Wed 6 Mar, 2013 07:53 pm
Is it possible to create a remote, targeted magnetic field without having a physical magnet in the center of it? If so does anyone have suggestions on how I could manage this.
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Type: Question • Score: 1 • Views: 587 • Replies: 3
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dalehileman
 
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Reply Thu 7 Mar, 2013 03:41 pm
@ankokugai,
Ank that's really a good q and I hope somebody else responds. I'm supposing that you can generate a field locally and that if it's strong enough there will be some residue at a distance unless by "targeted," you mean local at that distant spot
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DrewDad
 
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Reply Thu 7 Mar, 2013 04:03 pm
@ankokugai,
Magnetic fields are created by moving electric charges. Aligned electron spins are what allow physical magnets to work.

So you need an electrical current, or a physical magnet, to create a magnetic field.
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Thomas
 
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Reply Thu 7 Mar, 2013 04:13 pm
@ankokugai,
ankokugai wrote:
Is it possible to create a remote, targeted magnetic field without having a physical magnet in the center of it? If so does anyone have suggestions on how I could manage this.

DrewDad is correct. So, wrap a piece of wire around a pencil, apply a voltage at both ends, and you're good to go.

Technical notes: You want to make sure the wire is coated so as not to short-circuit the coil you're making. Also, you want a resistor between the battery and at least one end of the wire so as not to short-circuit the poles of the battery. But in principle, that's all it takes to create a magnetic field like that of a bar magnet.
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