Led Zeppelin Reunion A electric guitar pickup is actually much like a powerful mike coil. For many years, dynamic microphones have already been wired with the style coil attached to the principal of the microphone's transformer, and not called to surface (‘floating'). The microphone's situation is typically linked to the wire guard, that will be connected to the microphone amplifier's soil (see Rane's website for more discussion).
By and big, dynamic microphones are very calm units consequently of the mix of transformer isolation and balanced, flying sign lines through the duration of, in addition to protected, humbucking coils.
So why don't you guitars? Instruments are notoriously overwhelmed by noise. Humbucking pickups are only a partial (though crucial!) solution. Well-known alternative is to float the guitar pickup to a balanced production, being a microphone. A similar idea was printed this 2001 patent software like this Led Zeppelin Reunion?