electro magnetic

3 WAYS TO INCREASE THE STRENGTH OF AN ELECTROMAGNET
* INCREASE NUMBER OF COILS THAT WRAP AROUND THE CORE
* INCREASE THE CURRENT FLOWING THROUGH THE COIL
* CHANGE THE CORE MATERIAL TO BEST SUIT THE ELECTROMAGNET

http://spreadsheets.google.com/ccc?key=0AhmcrnKDxOH9dDhyOXBsdlYxTU1VYWNVN0ZxekQ3eXc&hl=en

what are magnetic flux lines??

magnetic flux is a measure of the magnetic field strength existing on a two dimensional surface, such as one side of a magnet

RULES FOR FLUX LINES.

1.cant cross
2.try to shorten
3.north to south
4.cant be broken