Line Current in Three Dimensions

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SUMMARY

The discussion revolves around calculating the magnetic field produced by a line current in three dimensions, specifically addressing the confusion around the placement of angles theta1 and theta2 in the diagram. The user expresses uncertainty regarding the correct interpretation of the perpendicular distance (r) from the point to the current and the z-axis, leading to a negative magnitude in their calculations. The primary equation referenced for the magnetic field is derived from the Biot-Savart Law, which the user feels unprepared to derive again. The urgency of the homework deadline adds to the need for clarity and assistance in solving the problem.

PREREQUISITES
  • Understanding of the Biot-Savart Law for magnetic fields
  • Familiarity with vector calculus and three-dimensional geometry
  • Knowledge of magnetic field direction conventions
  • Ability to interpret physical diagrams accurately
NEXT STEPS
  • Review the Biot-Savart Law and its application in three-dimensional problems
  • Study vector components and their significance in magnetic field calculations
  • Practice problems involving magnetic fields from line currents
  • Learn about the right-hand rule for determining magnetic field direction
USEFUL FOR

Students studying electromagnetism, physics educators, and anyone seeking to understand the principles of magnetic fields generated by line currents in three-dimensional space.

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Homework Statement



[PLAIN]http://img515.imageshack.us/img515/5139/physicsproblem.jpg

Homework Equations



in the image

The Attempt at a Solution



I don't know if i placed the angles theta1 and theta2 correctly in the diagram..I feel like this is incorrect, since the value i calculated for magnetic field is negative..and the direction is positive y, so it feels incorrect to me...

can someone do this problem and check if my answer is correct?
 
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i really need help with this problem , i am more confused than ever:

is r perpendicular the distance from the point to the start of the current? in which case, it is sqrt(2)?
or is it the perpendicular distance from the point to the z axis? in which case it is 1...

how come i get a negative magnitude?(in my answer i just made it positive)
does that mean the direction has to be the opposite? so it has to be -y direction?

please i really need help
 
i am begging for help, the problem is due tomorrow,
the only equation i was given for magnetic field due to line current was the one i used in the image, and i don't think i am expected to solve it by deriving the bio-savart law again..i need help please
 

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