Please help. My example:
You take a sheet of steel and suspend it in the air.
Then you take a permanent magnet (i.e. a neodymium magnet) and attach it to the sheet of steel and from that you suspend a 1kg weight. The weight and magnet will stay put providing that the room doesn’t change and that gravity is still acting on the objects.
Now you take a separate piece of steel (which is not magnetized) and try attach that and the 1kg weight to the suspended sheet of steel. You notice that without an external magnetic force you are unable to attach the two pieces together.
Now here is where my confusion lies. You then attach a electromagnet to the 2nd piece of steel and notice that it stick but the battery you have used to power the device drains. But all this time the permanent magnet with the same load and in the same conditions hasn’t why??