# Induced Electric Field

by ElectromagStudent
Tags: electric, field, induced
 P: n/a So when this electric field appears due to the d_t B if I place a test charge there and circulate the field I will do no work? "Bossavit" wrote in message news:ge176p$ku0$1@fb07-hees.theo.physik.uni-giessen.de... > > >the variation of the magnetic flux in time > >will generate an induced electric field (...) > >My question concerns this induced electric field. > >What is the electric potential of this induced field (...) > > That's the point: There is NO electric potential for this induced > field. If we had one, i.e., if we had E = - grad Phi, that would > entail curl E = 0, instead of Faraday's curl E = - d_t B, where the > r.h.s. is nonzero in the situation you describe.
 P: n/a ElectromagStudent wrote: > So when this electric field appears due to the d_t B if I place a test > charge there and circulate the field I will do no work? The E-field will do work. To get down to practicalities you might try to understand how a tokamak device works. Jan -- A: Because it messes up the order in which people normally read text. Q: Why is it such a bad thing? A: Top-posting. Q: What is the most annoying thing on usenet? > "Bossavit" wrote in message > news:ge176p$ku0$1@fb07-hees.theo.physik.uni-giessen.de... > > > > >the variation of the magnetic flux in time > > >will generate an induced electric field (...) > > >My question concerns this induced electric field. > > >What is the electric potential of this induced field (...) > > > > That's the point: There is NO electric potential for this induced > > field. If we had one, i.e., if we had E = - grad Phi, that would > > entail curl E = 0, instead of Faraday's curl E = - d_t B, where the > > r.h.s. is nonzero in the situation you describe.