In continuing my reading of the NEETS modules, this week I learned more about alternating current. While direct current only flows in one direction, alternating current regularly switches directions. An AC circuit can be made by spinning a conductor, such as a loop of wire, in a magnetic field. This forms a generator. One way to determine the direction of current flow is to use the left hand rule: when holding your hand as shown in the example (taken from the NEETS module), your thumb will point in the direction of rotational motion, the index finger shows the direction of magnetic flux (movement from north to south), and the middle finger points in the direction of current flow. An easy way to remember the left hand rule is My Fine Clothes- Movement (thumb), Flux (index finger), Current (middle finger).
