because the copper wire in it is only magnetic when there is electricity running through it so when you turn of the electricity soure it is no longer magnetic
permanet object
Permanet Magnet
a electromagnet is bigger than a bar magnet
electromagnet
a temporary magnet can be created by an electromagnet but it can also be created by any type of strong magnet
By definition an electromagnet is only working when it has a supply of electricity, a Permanent Magnet is always a magnet
Iron, Cobalt and Nickel.
Perminant magnet
the world is
An electromagnet.
no
An electromagnet is a stronger magnet.