Magnetism Problem: Magnitude & Direction of Force

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Homework Help Overview

The problem involves determining the magnitude and direction of the force acting on one wire due to the magnetic field produced by another wire, specifically in the context of magnetism and the Lorentz Force. The discussion centers around parallel wires carrying currents in opposite directions.

Discussion Character

  • Exploratory, Assumption checking, Conceptual clarification

Approaches and Questions Raised

  • Participants discuss the relevance of the Lorentz Force and the implications of the currents being opposite, suggesting a repulsive interaction. Questions arise regarding the necessity of knowing the length of the wires and whether the force should be expressed as a total force or force per unit length.

Discussion Status

The discussion is ongoing, with participants exploring different interpretations of the problem and clarifying assumptions about the wire lengths and the nature of the forces involved. Some guidance has been offered regarding the correct units for expressing the force.

Contextual Notes

There is uncertainty about the length of the wires, which is critical for calculating the force. Participants note that the problem may be asking for force per unit length rather than total force.

blue_soda025
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Could someone help me with this problem? I don't really know how to do it..

http://www.webpost.net/bl/bluesoda025/magnetism.gif

What is the magnitude and direction of force acting on wire 1 due to the magnetic field produced by wire 2?
 
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This type of problem is a huge deal, you should attempt to master it. It uses the Lorentz Force.

More information http://hyperphysics.phy-astr.gsu.edu/hbase/magnetic/magfor.html"
 
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On that site too, here it has specifically the paraelle wires.

here

And since the currents are opposite, should repel from each other. Oh yeah, was there a length of one of the wires given too? I'll have to dig out my book, think it derived 2 infinite wires, I'll get back to you on that.
 
Unless the length of the wire is known, you'll have to specify the force per unit length.
 
Skomatth said:
Unless the length of the wire is known, you'll have to specify the force per unit length.
Often, in problems like this, "force" is loosely asked for when really it should be "force per unit length". So, make sure you give the answer in the correct units.
 

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