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You seem to be asking two questions. How does the inducedjlu@HEP.ANL.GOV 03/22/00 11:05AM >>>
Can someone help me out and check my reasoning.conventional
Given: a long straight wire lying on a horizontal table carrying
current north. Next to the wire, on the right, is a metal ring lyingflat on
the table.B-field inside
If the current in the wire is increased, there will be a growing
the metal ring directed down into the table. This should (I'm prettysure)
induce a counter-clockwise current in the ring which will cause aB-field up out
of the table in opposition to the change in field that induced thecurrent in
the first place (Lenz's Law?)this induced
What bothers me is that (by my understanding is that by Lenz's law)
current in the ring should somehow oppose the increasing current inthe wire,
and I don't see the mechanism for that. If the ring was part of acircuit with
resistance, the induce current would do work, which would mean thatit would
take more work to increase the current in the straight wire when theloop was
present than without the loop.difficult
What mechanism would make increasing the straight wire current more
with the wire loop there?
Stu Leinoff
Adirondack Community College