Peak Voltage vs magnet position in an A.C generator

[jearls74]

I have a question about a magnets position over a coil of wire in an A.C generator. Is the voltage in the coil at Peak as long as its covered by the magnet? and then the voltage starts to decrease to 0 volts as the magnet starts uncovering the coil until the magnet totally uncovers the coil and the voltage is at 0 volts, is this right?

 

[vk6kro]

You would have to know the shape of the magnetic field.

In this simple example,

[PLAIN]http://dl.dropbox.com/u/4222062/magnetic%20field.PNG

You can see that the wire (shown as an orange circle) is in a magnetic field even though the magnet is some distance away.

Even though the wire is cutting lines of magnetic flux, they are not at right angles to the direction of movement, so the voltage being generated is less than when the wire is directly opposite the magnet and when the lines of magnetic flux are at right angles to the direction of movement.

 

[sparkey]

your peak voltage is generated as your conductor passes through the densest part of the magnetic flux.