Well during my physics class my teacher had a very good explanation with a coil and a magnet. When a approaches a magnet a coil it produces an induced current. Which depends which end of the magnet is in the lead will matter in the direction. This current will produce a magnetic field that opposes the magnet and pushes it back. When it's inside it doesn't produce any more current. As it leaves the other side it once again induces more current but it attracts the magnet back towards the coil. This is all do to Flux. Flux is equal to the change in the magnetic field. So as when its in the middle the field isn't changing. Because what's going out is coming back in so the net change is zero. But when it's leaving or entering the there is a change and coil opposes the change.
So the example she used to explain all of this is like how women are with men. When a man makes a move on a woman she's opposes it and is like get away. But once the girl likes him she doesn't want him to leave. She pulls back on him. Thus girls are coils and men are coils. All things may be explained through physics. Isn't it great!?
Sunday, May 31, 2009
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