inaccensa

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There is a question which is asking me what is the net magnetic field zero.

i can't seem to upload the image, but it's a straight wire which loops once. Think of a straight wire will one loop (or circle ) on top. the current flows from left to right in the wire and counterclockwise in the loop.
 
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Compass

Squishy
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There is a question which is asking me what is the net magnetic field zero.

i can't seem to upload the image, but it's a straight wire which loops once. Think of a straight wire will one loop (or circle ) on top. the current flows from left to right in the wire and counterclockwise in the loop.
You need to upload the image to an imagehost like ImageShack.us or Photobucket.com

Is your diagriam like this: O------ or like this |-------

I can't visualize what you're asking with your word descriptors.