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Re: [Phys-l] Question about Electromagnetic Induction



But electric circuits don't have confined electric FIELDS.
The 'stray' electric fields can be important.

A simple battery resister circuit isn't as simple as most would have us believe - in terms of fields.

The Poynting vector (don't ALL vectors point ;-) shows that the thermal energy that accumulates in the resister comes from the 'stray' fields rather than thru the wires.
air
On Apr 9, 2009, at Apr 9(Thu) 1:05 , Brian Whatcott wrote:

The fact that stray field exists is not on account of the closed
circuit nature of magnetic flux, so much as the limited confinement
which the magnetic material usually used in magnetic circuits offers.
The comparable electric circuit usually exhibits very low stray
electric current on account of the
high resistance of a typical insulator such as air.