Graphite electromagnetic induction

[hackhard]

since graphite conducts. if spiral shape is drawn with pencil on the wall (thick , dark lines)
will a voltage difference appear between inner and outer end of the spiral when a varying magnetic field is switched on, normal to wall

 

[TJGilb]

Sounds like a fun experiment. Perhaps you should take a magnet, a voltmeter, and try it out.

 

[hackhard]

but graphite is very limited in how high a frequency you can use. will magnetic saturation parameter of graphite cause problem at high frequency
https://en.m.wikipedia.org/wiki/Saturation_(magnetic)