# Creating alternating current (A.C.)

We can create an alternating current from the mechanical movement of turning around a handle.

Producing an alternating current means the voltage produced alternately reverses from positive to negative polarity producing a corresponding change in direction of current flow.

We can use Flemings right hand rule.

Right = Induced

Flemings right hand rule shows us the direction of the current in the wire below.

When the handle has been spun 180° you can see the direction of the current in the wires has reversed.

The galvanometer will show a complete movement from one side to the other and back again.

If you were to plot the voltage change through time for one complete 360° revolution of the handle you would find the following:

NOTE: Point A is where the wires within the magnetic field are vertically aligned. Point B is at the 1st diagram. Point C is at the second diagram.