Magnetic Field Calculation for Parallel Wires

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SUMMARY

The discussion focuses on calculating the magnetic field generated by two parallel wires carrying a current of 3.25A, spaced 20.36cm apart, with the magnetic field evaluated at a point 30.82cm from both wires. The right-hand rule is essential for determining the direction of the magnetic fields produced by each wire. Participants emphasize the importance of vector addition to find the resultant magnetic field at the specified point. The discussion highlights the need for clarity in showing calculations to facilitate effective assistance.

PREREQUISITES
  • Understanding of magnetic fields generated by current-carrying wires
  • Familiarity with the right-hand rule for determining magnetic field direction
  • Knowledge of vector addition in physics
  • Basic principles of electromagnetism
NEXT STEPS
  • Study the formula for the magnetic field around a long straight wire
  • Learn how to apply the right-hand rule in various scenarios
  • Practice vector addition with magnetic field vectors
  • Explore the superposition principle in electromagnetism
USEFUL FOR

Students in physics, particularly those studying electromagnetism, as well as educators and anyone needing to understand magnetic field calculations for parallel wires.

Bavarian Rave
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The diagram (see picture) depicts two long horizontal straight parallel wires that are a distance d=20.36cm apart and each carries a current of 3.25A in the same direction, out of the page. What is the magnitude of the magnetic field at a point that is a perpendicular distance r=30.82cm from both wires?


While I have "attempted" this problem, i know my attempts are wrong. (having missed 2 days of classes due to illness, i am behind and my homework is due tomorrow). thanks for any help you can give.
 

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You'll have to show us where your attempts go wrong so we know where to help you. Do you know the result for the magnetic field from an infinite wire?
 
Last edited:
Bavarian Rave said:
The diagram (see picture) depicts two long horizontal straight parallel wires that are a distance d=20.36cm apart and each carries a current of 3.25A in the same direction, out of the page. What is the magnitude of the magnetic field at a point that is a perpendicular distance r=30.82cm from both wires?


While I have "attempted" this problem, i know my attempts are wrong. (having missed 2 days of classes due to illness, i am behind and my homework is due tomorrow). thanks for any help you can give.

Use the righthand rule to draw the B-fields for each wire. What directions do each field have at that point P? Draw the two vectors there, and add the two vectors in rectangular coordinates. Show us your work.

Welcome to the PF.
 

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