Analyzing Conditions for Current Flow Through Resistor R

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Homework Help Overview

The discussion revolves around the conditions under which current flows through a resistor in the context of a wire loop near a current-carrying wire, specifically analyzing the implications of Lenz's Law.

Discussion Character

  • Conceptual clarification, Assumption checking

Approaches and Questions Raised

  • Participants explore various scenarios regarding the behavior of current in relation to changes in the current of the nearby wire, questioning the validity of different conditions for current flow.

Discussion Status

Some participants have provided reasoning based on Lenz's Law, while others are seeking clarification on the implications of decreasing current and its effect on induced current direction. The discussion is ongoing with multiple interpretations being considered.

Contextual Notes

There is a focus on understanding the relationship between current changes and induced currents, with specific attention to the definitions and implications of Lenz's Law. Participants are also navigating the nuances of the problem setup.

mike1234
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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
 
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Why aren't you sure? What's your reasoning?
 
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
 
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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