How do you make a strong electromagnet?

Question

-a magnet that can pick up more than just a paperclip
-also, a magnet that repels just as strong as it attracts.

Answer 1

Using a DC current gives the electromagnet poles - either will attract a ferromagnetic substance like iron or nickel and repel a magnet whose poles are the same at the closest point (north pole attracts a south pole, but repels another north pole).
You need - a strong DC power source; copper wire (coated to prevent short circuiting) and a ferromagnetic core (like a large steel nail) to wrap the copper wire around. Strength is related to: number of windings (the more, the stronger); the current strength; the thickness of the wire itself and the material of the core it is wrapped around (iron is best).
So... more coils; more current!!!!!!!!!!!!!

Answer 2

Many windings of wire around an iron core with the wire ends attached to a DC source. Magnetic polarity is a natural property of same, although any ferrous non-magnet will be attracted by either pole. No uni-polar magnets have yet been found although many have looked for that in nature.

Answer 3

You would need a more rare Earth Magnet, is the answer to your Question. It's one of the Strongest

Answer 4

take some iron nails and winde it up with some copper wire.
now pass current through it and charge it ,as much magnetic power you need.

Answer 5

a strong electromagnet can be made by placing steel or iron rods in the coil and then passing current into the the coil

Answer 6

pass more current through the iron bars so as to make them a strong electromagnet.

Answer 7

Take a straw and wrap the wire arround the straw then pass the straw over a bb and see if it will pick it up @ launch it to .cieling .