How can the pull of a electro-magnet be blocked or stoped or diverted?

Answer 1

There is a material called "mu-metal" which acts as a magnetic shield. It has a large permeability, so the magnetic field is short-circuited through it. You could also pull the plug on the power supply.

Answer 2

If the field is constant, then a mu-metal would be necessary. If the field is changing, then a metal such as copper will work. This is because the changing field induces eddy currents in the conductor. If the field isn't a dynamic field then a metal such as copper won't work. An electro-magnetic field can't be "blocked", but can be contained or essentially "short-circuited."

Answer 3

You could apply an equally strong electro-magnet of the same magnitude but in the opposite direction. The resulting magnetic field would cancel the original magnetic field.

Answer 4

magnetism cannot be blocked or stopped. the best way to insulate something from the magnetic force is to surround it in a conductive material, such as copper, to divert the magnetic field around the object you are trying to isolate.

Answer 5

Unplug it. If you can't than a magnet of equal force set in opposite polarity or copper shielding to decrease the effect.

Answer 6

1)With a insulating source, must be made of material with cumulative bonding of 5 or more valence electrons.

2) Nuclear electromagnetic shock wave of apposing origin.

There are 3 others but I cant remember all of them right now.

Answer 7

Mu metal, or any superconductor.

Answer 8

AC or DC magnet????

Answer 9

mu metal
http://en.wikipedia.org/wiki/Mu-metal