I haven't figured it out yet, I find it way above my understanding of phyiscs
Suppose we have two circular parallel plates or radii r, both the same radius. They have a Voltage difference of V and they are separated a distance d. What would be the Electric Field in the whole space? Actually...
The idea is as it follows:
We have an homogeneus magnetic field that was increased from 0 to Bf. It induced a certain current (that accumulated to a charge Q) in a circular coil of radius a and resistivity \rho constant. The question is, what would be the charge Q' when the coil is twisted...