Tuesday, December 11, 2007

Motors


today we had a lab about electricity. There were three experiments, but we only got to one and a half so I won't talk about the last one. In the first experiment we wrappesd copper wire around a straw and attached both ends of the wire to a battery. The we put a needle into one end of the straw and because the wire had been magnetized by the energy moving through it, the needle moved to the middle of the straw on its own. Then we made a contraption with wire that looks like that. We had to make a coil of wire with the ends poking out of it. Then we set up the battery-rubber band-paperclip-magnet thing and we put the wire on top of the paper clips and spun it. The point of the experiment was to make an instrument that would keep the wire spinning forever. However, ours was not working properly, so it would just spin once or twice then stop.