Current in Top Loop: Increase, Decrease, or No Change?

AI Thread Summary
When the current in the bottom loop increases, the top loop's current is affected by Lenz's Law, which states that an induced current will oppose the change in magnetic flux. The discussion suggests that as the current in the bottom loop increases, it creates a magnetic field that induces a current in the top loop, leading to a decrease in the top loop's current. The reasoning is based on the right-hand thumb rule, indicating that the magnetic field direction is upward. Thus, the increase in current in the bottom loop results in a decrease in the current in the top loop. Overall, the interaction between the two loops demonstrates the principles of electromagnetic induction.
chukie
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Two loops have current flowing through them (see picture). The top loop lies directly above the bottom one. When the current in the bottom loop is increased, what happens to the top loop's current? Does it increase, decrease, go to zero, doesn't change or it depends on the relative values for current.

http://img167.imageshack.us/img167/56/loopto0.th.png


I was thinking that this had something to do with Lenz's Law. So I was thinking when the top current increase, the bottom would try to counter it by also increasing? But there is no magnetic field involved?
 
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the current in above one should decrease.

i hope the diagram is correct ((current in both of them is clockwise .))

so by right hand thumb rule magnetic field would be in upper direction
as current increases it would also increase the mag. F
now by lenz's law current in above should decrease.
 

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