8.S.II.B.2

Connection between electricity and magnetism Example: move a magnet back and forth in front of wire connected to a meter, and electricity flows in the wire. The reverse: electric current flowing through a wire exerts magnetic attraction. Spinning electrons in an atom create a magnetic field around the atom. Unlike magnetic poles attract, like magnetic poles repel. Practical applications of the connection between electricity and magnetism, for example: An electric generator creates alternating current by turning a magnet and a coil of wire in relation to each other; an electric motor works on the reverse principle. A step-up transformer sends alternating current through a smaller coil of wire with just a few turns next to a larger coil with many turns. This induces a higher voltage in the larger coil. A step-down transformer does the reverse, sending current through the larger coil and creating a lower voltage in the smaller one