Home made Electromagnet Project

1. I don't understand the Q
2. _{I think it can but very very very weakly}

3. No, but a magnet will effect the display on a CRT (old tube style TV or monitor)

No attraction to Al, Au, Ag, Cu and probably others.

LL

For part 1, it could be;

a) length (L) of wire, wrapped n times, tidily on a ø radius nail.

b) Length (10L) of wire wrapped loosely at a 10ø radius.

c) length (L) of wire that's tapered like a cone, then wrapped on a nail.

d) length (L) of wire that's wrapped, but overlaying itself (bit like an old LP).

e) length (L) of wire, but comparing different thickness.

f) length (L) of wire that's been wrapped very messy, going up and down the nail.

g) all the above, but with different ø nail.

h) nail that is tapered all along (usually called a cone)

i) nail with varying thickness

j) nail that's not tapered, but has variable thickness

h) homework/silliness that can be butchered

j) homework that should be helped, because admin have some new policy (a bit like that thread about the guy helping his students to take part) but we aren't clear on how it works yet.

k) none of the above.

Ques sais-je ?

Guest,

With respect to # 2, Aluminum is diamagnetic, and is not attracted to a magnetic field. Actually the opposite is true, Al is repelled by the magnetic field. I suggest you do a little reading up on Lenz' law & electromagnetic induction.

A couple of years ago, I helped my son build an electromagnetic repulsion coil for his 8th grade science symposium. The principle of electromagnetic repulsion of diamagnetic metals (such as Cu & Al) is apparently not widely known, and the way that my son's coil hurled short sections of Cu & Al tubing many feet in the air surprised many of the adults in the audience...

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Just my $0.02...

Thought the question was about magnets, not electromagnets.

Thought the question was about attraction, not repulsion.

lynlynch,

If you read the original post, Guest referred to "turns of wrap coil around the nail"...

That sounds like an electromagnet to me ...

And the Guest also asked if aluminum would attract a magnet... I was informing him that the answer is NO, and in fact, the opposite (i.e., repulsion) would occur...

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just my $0.02...

You're right.

I was being too literal.

I'll read more carefully next time.

Hello,

Would it be possible to see a detailed picture of the electromagnet you built for your son? Thank you.