Compass effect

[Mike(Mont)]

I don't know much about this and was hoping someone could enlighten me.

I was working with a coil and noticed when i moved to a north/south direction the coil produced a strong signal. No amplifier just connected to a multimeter. I assume this is what some call the compass effect. the coil needs to be moving through the flux lines for this to occur. The same principle how a generator works--move a conductor through a magnetic field to produce electricity.