- #1
DocZaius
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Hello,
While considering Faraday's Law of Induction, I tried to think of a situation which would expose some difficulties I have with the notion that there is an induced EMF without clear regions of relatively high and low voltage (as in a battery). Here is what I thought would get me started:
Consider a circular loop of wire. The top half is made of wire twice as resistant as the bottom half. A uniform magnetic field changes with time through the surface bounded by the loop. Is the (induced) electric field at a point at the top of the loop equal to the electric field at a point diametrically opposed (and therefore in a part of the loop half as resistant)?
Faraday's Law seems to make a statement about the EMF induced around the whole loop, but not how it would vary within that loop due to changes in resistance. Or does it?
edit: Remove a mistaken consideration.
Thanks for any help!
While considering Faraday's Law of Induction, I tried to think of a situation which would expose some difficulties I have with the notion that there is an induced EMF without clear regions of relatively high and low voltage (as in a battery). Here is what I thought would get me started:
Consider a circular loop of wire. The top half is made of wire twice as resistant as the bottom half. A uniform magnetic field changes with time through the surface bounded by the loop. Is the (induced) electric field at a point at the top of the loop equal to the electric field at a point diametrically opposed (and therefore in a part of the loop half as resistant)?
Faraday's Law seems to make a statement about the EMF induced around the whole loop, but not how it would vary within that loop due to changes in resistance. Or does it?
edit: Remove a mistaken consideration.
Thanks for any help!
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