My understanding is that fluid dynamics in the convective zone generate electric fields and are what drives the magnetic fields which are then pushed up into the photosphere by differential rotation. Question is are electric fields or currents also present in the plasma filled magnetic and coronal loops that can be seen on the surface? If so, 1) can we detect the presence of them though some telescopic means or can they be expressed in formulas? 2) Do they have a positive/negative charge or does the plasma neutralize them? Thanks!