Problems with electromagnetic fields

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Homework Help Overview

The discussion revolves around drawing magnetic field lines for a given diagram related to electromagnetic fields and determining the direction of the force on a conductor using the right-hand rule. Participants are exploring the accuracy of their diagrams and the representation of magnetic fields.

Discussion Character

  • Exploratory, Conceptual clarification, Problem interpretation

Approaches and Questions Raised

  • Participants are questioning the accuracy of their field line diagrams, particularly in terms of symmetry and shape. There are discussions about the nature of the magnetic field around a horseshoe magnet and the appropriate representation of field lines.

Discussion Status

Some participants have provided feedback on the accuracy of the original poster's diagram, suggesting improvements and clarifying misconceptions about the shape of magnetic field lines. There is an ongoing exploration of how to accurately depict these fields and the implications for determining the force direction.

Contextual Notes

Participants are working under the constraints of homework guidelines, which require them to draw field lines accurately enough to determine the force direction without needing to achieve perfect precision.

CAT 2
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Homework Statement


Copy the following diagram and draw field lines for both magnetic fields. Then, use them to determine the direction of the force acting on the conductor. HINT: Check your answer, using the right - hand rule for the motor principle.
Their diagram:
ScreenShot_20180126153453.png


2. Relevant equation
n/a

The Attempt at a Solution



My diagram:
IMG_0507.JPG



Did I do this correctly? Thanks for any replies![/B]
 

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The B-field diagram isn't very accurate in shape (but the direction is okay), and given that the current is our of the page at us, the qVxB force is in the direction you have drawn. Maybe use Google Images to figure out how to draw a more accurate horseshoe magnet B-field distribution. :smile:
 
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Thanks. So what you are saying is that my circles aren't quite symmetrical, which they should probably be?
 
The field around the wire is fine. The field lines between the poles of the horseshoe magnet will not be circular. They are more like catenaries (stretched rubber bands). If you have iron filings handy, you can delineate the shape of the field and see for yourself.
 
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This is how they taught me, does it mean anything to you about if mine is ok or not?
ScreenShot_20180126211316.png
 

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CAT 2 said:
...does it mean anything to you about if mine is ok or not?
Your answer is good. The problem asks you to draw the field lines, but your drawing only needs to be accurate enough to determine the direction of the force. (The field of the permanent magnet will squash the circular lines surrounding the wire to some degree, for example, but that nicety is overkill here.)
 
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