Transformers

It's a little late for my blog, but I plan on doing it anyways. So, this is a picture of a transformer. A transformer uses magnets to change the voltage and current of a circuit. They also help change the voltage of a power plant to be compatible with the voltage of an ordinary house. The really cool thing about transformers is that the power in a transformer remains constant, but the voltage goes up when the current goes down and vice-versa. Another really cool thing about transformers is that they do not have direct current, like a battery. In fact, they have something called alternating current. In the transformer, there are at least two copper coils. Both have a different amount of coils. The one with more coils will have a higher voltage and a lower current and with less coils there will be a lower voltage and a higher current. This is caused by an electromagnetic induction. :) Isn't it cool?