What Are the Answers to These Magnetism Questions?

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Homework Help Overview

The discussion revolves around questions related to magnetism, specifically focusing on the behavior of currents in magnetic fields and the direction of forces acting on loops of wire. Participants are examining the implications of the law of conservation of energy in the context of magnetic interactions.

Discussion Character

  • Exploratory, Conceptual clarification, Assumption checking

Approaches and Questions Raised

  • Participants are attempting to determine the direction of current flow in response to magnetic fields and the forces acting on loops. Questions are raised about the reasoning behind the clockwise direction of current and the opposing nature of magnetic fields.

Discussion Status

There is ongoing exploration of the concepts involved, with some participants providing insights into the behavior of currents and magnetic fields. Multiple interpretations of the questions are being discussed, particularly regarding the direction of forces and currents.

Contextual Notes

Participants are working with specific homework questions that include attachments, which may contain additional information relevant to the discussion. The original poster has indicated uncertainty in their attempts, particularly with one of the questions.

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Homework Statement


Please see attachments.


Homework Equations


F=ILB


The Attempt at a Solution


F1 - F2 = FT = 5*10^-5
Second one no clue.
 

Attachments

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And why is the current in this one clockwise as viewed from the top?
 

Attachments

  • Screen Shot 2013-07-28 at 5.16.08 PM.png
    Screen Shot 2013-07-28 at 5.16.08 PM.png
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I think the answer to qn 4 is the current in the loop will flow in such a direction that the magnetic field produced by it will oppose the magnetic field of the magnet (law of conservation of energy). Hence, clockwise.
 
For the first one, the current will flow in such a direction that the magnetic field produced by that current will oppose the motion of the loop to the right by applying a force to the left
F=ILB
 
siddharth23 said:
For the first one, the current will flow in such a direction that the magnetic field produced by that current will oppose the motion of the loop to the right by applying a force to the left
F=ILB

But inside the loop the magnetic field would be the other way.
 
Yup. Basically it tries to stay in it's original state of rest and oppose change.
 

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