sci.physics.electromag

"Timo Nieminen" wrote in message
news:Pine.LNX.4.50.0803110936200.14355-100000@localhost...

> That said, "changing E causes B" and vice versa is a common just-so
> story
> in introductory textbooks. I wonder why?

It probably comes from the purely experimental situations of
demonstration. Quoting Halliday and Resnick in "Physics"; "A bar
magnet, thrust through a closed loop of wire, will set up a current in
the loop." And similar for a current in the wire sets up a magnetic
field near the wire. But note that they say "current" and not E field.
Clearly, thrusting the magnet through the loop *caused* the current in
the wire. But in other places they use the term "induces" instead of
causes.

Best,

Fred Diether
Co-moderator sci.physics.foundations