What is the Effect of Connecting a Load on the Polarity of Induced Voltage?

AI Thread Summary
Connecting a load to an open-circuited loop with an increasing magnetic field generates a curling electric field, which is expected to reverse the polarity across the terminals. The discussion highlights confusion regarding whether the polarity remains the same or changes when a load is connected. Despite the initial assumption that the electric field direction would reverse, others assert that the polarity does not change. The key equation referenced is Curl E = -dB/dt, which relates the changing magnetic field to the induced electric field. The resolution of this confusion is crucial for understanding electromagnetic induction principles.
johnstamos
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Homework Statement



This is seriously going to drive me insane. I know that a time changing B field produces a curling E field. For case #1, I have an open circuited loop with a B field increasing out of the page. This should create a polarity indicated in my picture.

I hook up a load to it. I have an electric field curling in the clockwise direction, E is proportional to current density, and so the polarity across the terminals should be reversed.

And yet my prof/all other people keep telling me that the polarity stays the same. So by connect a load, we actually reverse the direction of the electric field?

Homework Equations



Curl E = -dB/dt;

The Attempt at a Solution



see above


https://dl-web.dropbox.com/get/Public/Photo%20Feb%2025%2C%201%2053%2009%20AM%20%281%29.jpg?w=e2e0f3fc
 
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