I need a little help on a few questions that came up in my physics book..I have an exam soon, so I'm trying to get all the help I can possibly get. What is the similarity between a galvanometer and a simple electric motor? ????? I'm really stuck on this one. How can a magnet attract a piece of iron that is not magnetized? For this one, I think the fact that iron contains magnetic domains (which are atoms with north and south poles) has a lot to do why there is an attraction. Need more clarity though. How does the electric company use a transformer to moderate your house current? The answer of this question revolves around the transformers principle, which is when change occurs in the magnetic fields of current-carrying coil of a wire that is intercepted by the second coil of wire, which in the end induces voltage in the second coil. What I need more clarity on is how the exchange happens. Thanks.