- #1
greg_rack
Gold Member
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- Homework Statement
- Consider the situation below.
The wire carries a current ##I(t)## decreasing with time, in the direction ##-\hat{y}##. In which direction is the induced current moving in the conductive square coil?
- Relevant Equations
- Faraday-Neumann-Lenz's law
![IMG_1245.jpg IMG_1245.jpg](https://www.physicsforums.com/data/attachments/259/259747-cf6ade7a226c6dd4f9956103ce535955.jpg)
I'll try to explain to you my thinking behind this problem... tell me if it's correct or not.
In short, I have assumed the area enclosed between the wire and the left side of the coil to be ##A## in which is present a ##-\hat{z}## field, and noticed that the flux it generates must be canceled by that in the ##+\hat{z}## direction present immediately at the right of the wire, enclosed in the same ##A## area.
Now, all we are "left" with, is the area to the very right of the coil, with a ##+\hat{z}## decreasing(since ##I## is decreasing) field which contributes to the total flux of the coil; for FNL's law, this will create an induced EMF and hence a current in the counter-clockwise direction.
Am I correct?