Lenz's law

  • Thread starter mike1234
  • Start date
  • #1
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Homework Statement




wireandlooplenzslaw.jpg
The drawing shows a wire loop near a current -carrying wire. Under what conditions would current flow through resistor R from Right to left?

Homework Equations



Lenz's law

The Attempt at a Solution



4 answers
a) when the current I is increasing
b)when the current I is constant
c)when the current I is decreasing
d)all of the above

I think its C but not sure
 

Answers and Replies

  • #2
Doc Al
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Why aren't you sure? What's your reasoning?
 
  • #3
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well I know according to Lenz's Law an induced current always flows in a direction that opposes the change that caused it. but with answer C it just decreasing but not heading in the opposite direction so I was not sure
 
  • #4
Doc Al
Mentor
45,398
1,806
The magnetic field from the current points into the loop (into the page). Since it's decreasing, the change in flux is out of the page. (You've got it.)
 

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