Comparing Magnetic Field Strengths with Vectors

AI Thread Summary
The discussion revolves around understanding the differences in magnetic field strengths in relation to their orientations. Participants highlight the importance of visualizing the pre-existing magnetic field and the field generated by the current to identify areas of reinforcement and opposition. The right-hand rule is suggested as a method to determine the direction of the magnetic field due to the current. Clarification is sought regarding specific elements of the problem, such as the significance of the truncated rectangles and the variable (d). Ultimately, sketching the vectors is emphasized as a crucial step in resolving the confusion.
Cici2017

Homework Statement



Screen Shot 2017-07-22 at 9.04.03 am.png

Homework Equations

The Attempt at a Solution


Shouldn't they be the same? Does one being above the current and the other being below make any difference? I know when there is a higher density of magnetic field lines, the magnetic field strength is greater, but in this case, isn't it the same?
I'm so confused , please help~
 
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I think you need to explain more about the scenario. What is the import of the (d) that is mentioned? What is the significance of the two truncated rectangles at wither side of the image? Is there a pre-existing magnetic field involved that you haven't mentioned? Please state the original question in its entirety.
 
gneill said:
I think you need to explain more about the scenario. What is the import of the (d) that is mentioned? What is the significance of the two truncated rectangles at wither side of the image? Is there a pre-existing magnetic field involved that you haven't mentioned? Please state the original question in its entirety.
Oh Yes, Sorry~
 
Screen Shot 2017-07-22 at 10.17.24 am.png
 
Okay, so there is an existing field due to the magnets represented by the rectangles. Sketch in the pre-existing field and then the field due to the current. Where do they reinforce and where do they oppose? You'll probably want to use the right and rule for the magnetic field due to a current :wink:
 
gneill said:
Okay, so there is an existing field due to the magnets represented by the rectangles. Sketch in the pre-existing field and then the field due to the current. Where do they reinforce and where do they oppose? You'll probably want to use the right and rule for the magnetic field due to a current :wink:
So the pre-existing magnetic field is from right to left (N to S) , and then the field due to the current is clockwise...how do I determine where they reinforce?
 
Cici2017 said:
So the pre-existing magnetic field is from right to left (N to S) , and then the field due to the current is clockwise...how do I determine where they reinforce?
Sketch the vectors!
 

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