how do i extract the pos.and neg. from a magnet and power a light?

Answer 1

you have to spin it really fast as in a generator.

Answer 2

Your ques is ambiguously worded a bit, so let me clarify first:

a magnet is a dipole of postive and negative magnetic terminals which cannot be separated. (as opposed to negative and positive electric charges, which can be separated).

Perhaps u are just asking abt lighting a bulb using a magnet?
The way u can do it is to make a 'solenoid' from a wire. i.e., wind the coil on a hollow plastic cylinder. Connect the ends of the wire to the bulb. Then, move the magnet in and out of the hollow cylinder. This changing magnetic flux inside will induce a voltage and hence current in the coil. This will light up the bulb. You need a strong magnet to light the bulb, depending on its wattage.

Answer 3

You don't. Magnetism and electricity are very closely related, but they're not the same thing. Find a good book on generators to learn how to move a magnetic field past a conductor and generate an electromotive force (EMF) that will cause current flow and light a light bulb.

Doug

Answer 4

To power a light you need to generate an electric current. One simple way to do this is to rotate a magnet rapidly through a coil of copper wire. This is the foundation of most electric motors. You can find plans for simple applications of this principle on the web.

Answer 5

This can't be done.