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The magnet is not using any energy ("doing work") to stay stuck to the fridge, because work = force x distance moved, and nothing is moving.The only energy transfer occurs when you stick the magnet to your fridge in the first place.If you were to use a gauss meter, using an axial probe, the side of the magnet that gives you a positive reading will be the North Pole.North Pole = North Seeking Pole = North Magnetic Pole = Positive Gauss Meter Reading --Mickmark21 (talk) , 15 October 2010 (UTC) I started to rework this page with the hopes of making it much clearer and more organized.Poles, North and South Magnetic The North Pole of a magnet, or compass, is attracted toward the north geographic pole of the Earth.If you were to use a compass to determine polarity, the South Pole of the compass will point towards the North Pole of a magnet.I guess this difference comes form the shape effect of the bar manget, but it should be verified.
I've never heard of or thought about it this way...which isn't to say that it's wrong, I've just never heard about it.
A magnet does not lose energy by being used, and will stay on your fridge forever unless something happens (such as heating, shock or a strong external magnetic field) to demagnetise it.
There is no "energy transformation", as you put it.
As the two objects approach, some of the magnet's field goes into the metal of the fridge, resulting in a decrease in the field's energy (technically speaking, you are decreasing the reluctance of the magnetic circuit).
The energy released from the magnetic field goes into pulling on your arm muscles, which turn it into heat.